8" rear in my L6 65 Ranchero
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- StarDiero75
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- Joined: Tue Jun 13, 2017 9:39 pm
8" rear in my L6 65 Ranchero
Howdy guys,
So I bought an 8" rear end and got the driveshaft fitted for it and all and I'm hearing this thing about pinion angle. The rear came out of a 66 Mustang, so should it be literally bolt up or does the angle angle need to be adjusted?
My car has a stock 200 and the 3spd manual.
So I bought an 8" rear end and got the driveshaft fitted for it and all and I'm hearing this thing about pinion angle. The rear came out of a 66 Mustang, so should it be literally bolt up or does the angle angle need to be adjusted?
My car has a stock 200 and the 3spd manual.
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--1965 stock 200 Ranchero w/ 3.03 column shift, 8" rear 2.8 (Yes I know the gearing sucks), weber 32/36, CRT Performance HEI.
--1961 Studebaker Lark VI, OHV 170 l6 in the process of being resurrected.
--Creator of the only Weber 32/36 conversion video.
--1961 Studebaker Lark VI, OHV 170 l6 in the process of being resurrected.
--Creator of the only Weber 32/36 conversion video.
- bubba22349
- Global Moderator
- Posts: 7784
- Joined: Sun Jan 03, 2010 4:46 pm
- Location: Flagstaff, Az. 86005 near the old Route 66
Re: 8" rear in my L6 65 Ranchero
The short answer is yes maybe. The only way to know for sure is to measure the front and rear driveshaft angles with an angle gauge to see if it's within specs. If everything is still stock it also maybe ok. Can't tell the angle of your front U Joint, the picture of rear U Joint looks like the pinion angle might be a little high. In the picture is car setting with all tires down (the suspention loaded) and on level ground? Good luck when you drive it check for any vibrations. 

A bad day Drag Racing is still better than a good day at work!
I am still hunting for a project car to build but with my current low budget it's not looking so good. My Ex- Fleet of Sixes these are all long gone!
1954 Customline 223 3 speed with O/D, 1963 Fairlane project drag car with BB6, 1977 Maverick 250 with C4, 1994 F-150 a 300 with 5 speed.
I am still hunting for a project car to build but with my current low budget it's not looking so good. My Ex- Fleet of Sixes these are all long gone!

- StarDiero75
- Registered User
- Posts: 268
- Joined: Tue Jun 13, 2017 9:39 pm
Re: 8" rear in my L6 65 Ranchero
bubba22349 wrote:The short answer is yes maybe. The only way to know for sure is to measure the front and rear driveshaft angles with an angle gauge to see if it's within specs. If everything is still stock it also maybe ok. Can't tell the angle of your front U Joint, the picture of rear U Joint looks like the pinion angle might be a little high. In the picture is car setting with all tires down (the suspention loaded) and on level ground? Good luck when you drive it check for any vibrations.
Yes, all the tires are on the ground and the floor is flat. Can I get an angle gauge at NAPA or something?Also what should the angles be between? Where can I get it adjusted?
Thanks
--1965 stock 200 Ranchero w/ 3.03 column shift, 8" rear 2.8 (Yes I know the gearing sucks), weber 32/36, CRT Performance HEI.
--1961 Studebaker Lark VI, OHV 170 l6 in the process of being resurrected.
--Creator of the only Weber 32/36 conversion video.
--1961 Studebaker Lark VI, OHV 170 l6 in the process of being resurrected.
--Creator of the only Weber 32/36 conversion video.
- bubba22349
- Global Moderator
- Posts: 7784
- Joined: Sun Jan 03, 2010 4:46 pm
- Location: Flagstaff, Az. 86005 near the old Route 66
Re: 8" rear in my L6 65 Ranchero
An example of an angle gauge is in the link below, yes you can find them many places like NAPA, Home Depot, Harbor Freight, etc. https://www.summitracing.com/int/parts/ ... suspension
Measureing the angles is fairly easy follow directions in below link and watch the video for tips too. Good luck
http://www.hotrodhotline.com/md/html/dr ... monics.php
Video
https://m.youtube.com/watch?v=d1VSyvLD55c
Measureing the angles is fairly easy follow directions in below link and watch the video for tips too. Good luck

http://www.hotrodhotline.com/md/html/dr ... monics.php
Video
https://m.youtube.com/watch?v=d1VSyvLD55c
A bad day Drag Racing is still better than a good day at work!
I am still hunting for a project car to build but with my current low budget it's not looking so good. My Ex- Fleet of Sixes these are all long gone!
1954 Customline 223 3 speed with O/D, 1963 Fairlane project drag car with BB6, 1977 Maverick 250 with C4, 1994 F-150 a 300 with 5 speed.
I am still hunting for a project car to build but with my current low budget it's not looking so good. My Ex- Fleet of Sixes these are all long gone!

- chad
- Registered User
- Posts: 3436
- Joined: Sat Oct 24, 2009 9:51 am
- Location: Lawrence Swamp, S. Amherst, MA
Re: 8" rear in my L6 65 Ranchero
I believe the correction (if beyond 5 - 8*?) are wege shaped shims of correct angle) @ leaf springs/rear axel tube contact area ('perch").
Not such a big deal. Findin the spec & measuring the rig is the tougher part...
Does it vibrate now?
Not such a big deal. Findin the spec & measuring the rig is the tougher part...
Does it vibrate now?
"Big thing is only make one change at a time. Change 2 or more things at a time it becomes difficult to figure which change helped or hurt" turbo2256b » 1/16/2017
Chad - '70 LUEB on '77 frame (i.e. PS, D44, trapezoidal BB 9", 4.11), 250, NV 3550 & DSII to B transplanted, "T" D20/PTO, 2" SL, 1" BL, 4 discs, 33"X15", etc. Seeking: Hydraulic gear motor for Koenig pto. chrlsful@aol.com (413) 259-1749
Chad - '70 LUEB on '77 frame (i.e. PS, D44, trapezoidal BB 9", 4.11), 250, NV 3550 & DSII to B transplanted, "T" D20/PTO, 2" SL, 1" BL, 4 discs, 33"X15", etc. Seeking: Hydraulic gear motor for Koenig pto. chrlsful@aol.com (413) 259-1749
- StarDiero75
- Registered User
- Posts: 268
- Joined: Tue Jun 13, 2017 9:39 pm
Re: 8" rear in my L6 65 Ranchero
chad wrote:I believe the correction (if beyond 5 - 8*?) are wege shaped shims of correct angle) @ leaf springs/rear axel tube contact area ('perch").
Not such a big deal. Findin the spec & measuring the rig is the tougher part...
Does it vibrate now?
Yeah it vibrates, I just took it out for the first time today. I had it up to 40 and it only vibrated on deceleration at around 25 and below to 15. Is this something I should probably take to a rear end guy to set? What should something like that cost?
--1965 stock 200 Ranchero w/ 3.03 column shift, 8" rear 2.8 (Yes I know the gearing sucks), weber 32/36, CRT Performance HEI.
--1961 Studebaker Lark VI, OHV 170 l6 in the process of being resurrected.
--Creator of the only Weber 32/36 conversion video.
--1961 Studebaker Lark VI, OHV 170 l6 in the process of being resurrected.
--Creator of the only Weber 32/36 conversion video.
-
- Registered User
- Posts: 830
- Joined: Sun Oct 19, 2003 6:10 pm
- Location: Michigan
Re: 8" rear in my L6 65 Ranchero
Try taking out the the drive shaft, turning it 180 and reinstall..Make sure that no pins are are out of place in the caps..make sure that the joint is in the yoke correctly and the u bolts are not over tight, it is easy to over tighten them.
66 Mustang Coupe
200 turbo w/lenco 4-spd
stock adj. rockers, stock timing set, ARP studs
best 1/4 mile ET 9.85/best mph 139 on 8 lbs progressing to 15 lbs boost
Went 9's when 10's was fast.
200 turbo w/lenco 4-spd
stock adj. rockers, stock timing set, ARP studs
best 1/4 mile ET 9.85/best mph 139 on 8 lbs progressing to 15 lbs boost
Went 9's when 10's was fast.
- StarDiero75
- Registered User
- Posts: 268
- Joined: Tue Jun 13, 2017 9:39 pm
Re: 8" rear in my L6 65 Ranchero
drag-200stang wrote:Try taking out the the drive shaft, turning it 180 and reinstall..Make sure that no pins are are out of place in the caps..make sure that the joint is in the yoke correctly and the u bolts are not over tight, it is easy to over tighten them.
Alright, how tight should they be?
--1965 stock 200 Ranchero w/ 3.03 column shift, 8" rear 2.8 (Yes I know the gearing sucks), weber 32/36, CRT Performance HEI.
--1961 Studebaker Lark VI, OHV 170 l6 in the process of being resurrected.
--Creator of the only Weber 32/36 conversion video.
--1961 Studebaker Lark VI, OHV 170 l6 in the process of being resurrected.
--Creator of the only Weber 32/36 conversion video.
Re: 8" rear in my L6 65 Ranchero
Did you have your driveshaft balanced?? Do that if rotating shaft 180" does not help. Then go after pinion angle if vibration still occurs.
Nice detailing on the hog head with glyptal red paint.
Nice detailing on the hog head with glyptal red paint.
67 mustang,C-4, with mod. 80 hd, custom 500 cfm carb with annular boosters, hooker headers, dual exh.-X pipe, flowmaster mufflers, duraspark II dist. with MSD-6AL. Engine 205" .030" over with offset ground crank & 1.65 roller rockers. 9.5 comp., Isky 262 cam.
2003 Ford Lightning daily driver. Recurving Distributors. billythedistributorman@live.com

2003 Ford Lightning daily driver. Recurving Distributors. billythedistributorman@live.com

-
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- Location: Michigan
Re: 8" rear in my L6 65 Ranchero
StarDiero75 wrote:drag-200stang wrote:Try taking out the the drive shaft, turning it 180 and reinstall..Make sure that no pins are are out of place in the caps..make sure that the joint is in the yoke correctly and the u bolts are not over tight, it is easy to over tighten them.
Alright, how tight should they be?
Tight enough to stay tight and not so tight that the bearings get pinched...About 14-17 FT/LBS.
66 Mustang Coupe
200 turbo w/lenco 4-spd
stock adj. rockers, stock timing set, ARP studs
best 1/4 mile ET 9.85/best mph 139 on 8 lbs progressing to 15 lbs boost
Went 9's when 10's was fast.
200 turbo w/lenco 4-spd
stock adj. rockers, stock timing set, ARP studs
best 1/4 mile ET 9.85/best mph 139 on 8 lbs progressing to 15 lbs boost
Went 9's when 10's was fast.
- StarDiero75
- Registered User
- Posts: 268
- Joined: Tue Jun 13, 2017 9:39 pm
Re: 8" rear in my L6 65 Ranchero
wsa111 wrote:Did you have your driveshaft balanced?? Do that if rotating shaft 180" does not help. Then go after pinion angle if vibration still occurs.
Nice detailing on the hog head with glyptal red paint.
I had the driveshaft balanced when I got the yoke changed over.
Thanks man. I actually bought it like that. The guy even chromed the whole rear end, not my taste but it was cheap and rebuilt. I would've done flat black.
I actually put the shims in yesterday for the pinion angle. It's 4 degrees negative now. It vibrates a little when decelerating from about 24 to 20 but otherwise smooth. It feels a lot nicer with the -4 ° wedge. Flipping the driveshaft could fix that?
--1965 stock 200 Ranchero w/ 3.03 column shift, 8" rear 2.8 (Yes I know the gearing sucks), weber 32/36, CRT Performance HEI.
--1961 Studebaker Lark VI, OHV 170 l6 in the process of being resurrected.
--Creator of the only Weber 32/36 conversion video.
--1961 Studebaker Lark VI, OHV 170 l6 in the process of being resurrected.
--Creator of the only Weber 32/36 conversion video.
- chad
- Registered User
- Posts: 3436
- Joined: Sat Oct 24, 2009 9:51 am
- Location: Lawrence Swamp, S. Amherst, MA
Re: 8" rear in my L6 65 Ranchero
"Flipping the driveshaft could fix that?"
...only 1 way.
...only 1 way.
"Big thing is only make one change at a time. Change 2 or more things at a time it becomes difficult to figure which change helped or hurt" turbo2256b » 1/16/2017
Chad - '70 LUEB on '77 frame (i.e. PS, D44, trapezoidal BB 9", 4.11), 250, NV 3550 & DSII to B transplanted, "T" D20/PTO, 2" SL, 1" BL, 4 discs, 33"X15", etc. Seeking: Hydraulic gear motor for Koenig pto. chrlsful@aol.com (413) 259-1749
Chad - '70 LUEB on '77 frame (i.e. PS, D44, trapezoidal BB 9", 4.11), 250, NV 3550 & DSII to B transplanted, "T" D20/PTO, 2" SL, 1" BL, 4 discs, 33"X15", etc. Seeking: Hydraulic gear motor for Koenig pto. chrlsful@aol.com (413) 259-1749
- StarDiero75
- Registered User
- Posts: 268
- Joined: Tue Jun 13, 2017 9:39 pm
Re: 8" rear in my L6 65 Ranchero
chad wrote:"Flipping the driveshaft could fix that?"
...only 1 way.
True that.
--1965 stock 200 Ranchero w/ 3.03 column shift, 8" rear 2.8 (Yes I know the gearing sucks), weber 32/36, CRT Performance HEI.
--1961 Studebaker Lark VI, OHV 170 l6 in the process of being resurrected.
--Creator of the only Weber 32/36 conversion video.
--1961 Studebaker Lark VI, OHV 170 l6 in the process of being resurrected.
--Creator of the only Weber 32/36 conversion video.
-
- Registered User
- Posts: 830
- Joined: Sun Oct 19, 2003 6:10 pm
- Location: Michigan
Re: 8" rear in my L6 65 Ranchero
StarDiero75 wrote:wsa111 wrote:Did you have your driveshaft balanced?? Do that if rotating shaft 180" does not help. Then go after pinion angle if vibration still occurs.
Nice detailing on the hog head with glyptal red paint.
I had the driveshaft balanced when I got the yoke changed over.
Thanks man. I actually bought it like that. The guy even chromed the whole rear end, not my taste but it was cheap and rebuilt. I would've done flat black.
I actually put the shims in yesterday for the pinion angle. It's 4 degrees negative now. It vibrates a little when decelerating from about 24 to 20 but otherwise smooth. It feels a lot nicer with the -4 ° wedge. Flipping the driveshaft could fix that?
I meant turn the drive shaft 180 or rear yoke if that is easier, not end for end. That would be a lot of work...Parts are not made perfect, if the drive shaft is out some and the pinion yoke is off the same way , it will be double out. If you rotate 180 the offs can sometimes cancel each other ...You just have to try it to see, may be worse...But it will give you an opportunity to check the u joint bearing and bolts.
Last edited by drag-200stang on Tue Oct 10, 2017 10:19 pm, edited 2 times in total.
66 Mustang Coupe
200 turbo w/lenco 4-spd
stock adj. rockers, stock timing set, ARP studs
best 1/4 mile ET 9.85/best mph 139 on 8 lbs progressing to 15 lbs boost
Went 9's when 10's was fast.
200 turbo w/lenco 4-spd
stock adj. rockers, stock timing set, ARP studs
best 1/4 mile ET 9.85/best mph 139 on 8 lbs progressing to 15 lbs boost
Went 9's when 10's was fast.
- StarDiero75
- Registered User
- Posts: 268
- Joined: Tue Jun 13, 2017 9:39 pm
Re: 8" rear in my L6 65 Ranchero
drag-200stang wrote:StarDiero75 wrote:wsa111 wrote:Did you have your driveshaft balanced?? Do that if rotating shaft 180" does not help. Then go after pinion angle if vibration still occurs.
Nice detailing on the hog head with glyptal red paint.
I had the driveshaft balanced when I got the yoke changed over.
Thanks man. I actually bought it like that. The guy even chromed the whole rear end, not my taste but it was cheap and rebuilt. I would've done flat black.
I actually put the shims in yesterday for the pinion angle. It's 4 degrees negative now. It vibrates a little when decelerating from about 24 to 20 but otherwise smooth. It feels a lot nicer with the -4 ° wedge. Flipping the driveshaft could fix that?
I meant turn the drive shaft 180 or rear yoke if that is easier, not end for end. That would be a lot of work...Parts are not made perfect, if the drive shaft is out some and the pinion yoke is off the same way , it will be double out. If you rotate 180 the offs can sometimes cancel each other ...You just have to try it to see, may be worse...But it will give you an opportunity to check the u joint bearing and bolts.
Sorry I meant spinning it. I'll be trying that tomorrow.
--1965 stock 200 Ranchero w/ 3.03 column shift, 8" rear 2.8 (Yes I know the gearing sucks), weber 32/36, CRT Performance HEI.
--1961 Studebaker Lark VI, OHV 170 l6 in the process of being resurrected.
--Creator of the only Weber 32/36 conversion video.
--1961 Studebaker Lark VI, OHV 170 l6 in the process of being resurrected.
--Creator of the only Weber 32/36 conversion video.
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