Flywheels - crossflow vs precrossflow

[addo]

Interesting discoveries after some prompting by a mate:

One's ring gear is set noticeably further away from the starter than the other. Yet I have never seen a distinction in starters!

Thicknesses varied; one at 21.2mm (possibly skimmed), one at 19.5mm.

One had a deeper offset than the other (by 20 thou).

Anyone got ideas why the variations are there?

 

[2502vxw]

I bought an 87 XF spac wagon with T5... solely for the T5 to go into my XW, but the motor had a heavy duty clutch and flywheel (pressure plate mounts with six bolts instead of 3) I took the heavy duty flywheel etc and replaced it with my old standard setup which bolted on fine and worked really well. The heavy duty unit has bolted straight on to my pre flow motor and the measurements are the same between my 221 and the 250 with new flywheel as far as distance from starter adn thickness.

 

[addo]

This is what I'd observed.

Top is 221, bottom is XE/XF with flimsy 5-speed. I found the regular (3-bolt) clutch interchanged like you did.

BTW, I only found out yesterday that pbs sold their clutch division to BCIA, now known as "Clutch Industries". Website:

http://www.clutchindustries.com.au/index.htm

Personally I am inclined to try the ones "Walkinshaw" liked. Price seems good for a performance oriented product.

Cheers, Adam.

 

[2502vxw]

heh, it seems I have run into some trouble... whilst the flywheels I have are the same thickness. The heavy duty pressure plate appears to be far thicker than the standard one (who'd have thought??) But... the throwout fork is pushed really far forward and there is no free play in the unit... Looks like I'll have to rip the gearbox out and put the standard flywheel and clutch on again.... And oh how I struggled to get the box and motor all in in one piece.... DAMMIT!

 

[addo]

Possibly just a different thrust bearing from what you describe.

Also - this is with the Dellow bellhousing set up for hydraulic, right? What about a shorter pushrod on the slave?

I want you to keep that clutch in there, because how you manage it will be informative to the rest of us!

 

[2502vxw]

yeah, I have thought about a shorter pushrod, but the problem is not just the free throw, but the horrible angle that the pushrod comes out at, it is nearly rubbing on the inside lip of the slave cylinder and that can't be right..... I guess I could purchase a high tensile bolt of the correct guage and just trim it off bit by bit until it works ... I LIKE THE WAY YOU THINK!!! Right, tomorrow....well, maybe Monday I'll be off to ye olde bolte shoppe and get me a fine example of boltish goodness and see what's what.... even if I blow a bolt during preliminary testing I'll have the data to make it easier for the next chap to have a go!... for your info... when changing to a T5....you need an 8mm plate on top of the gearox crossmember, braced by 8mm triangular supports from the crossmember back at either edge of the horizontal plate (hell I'll take a photo)... you need to compensate by adding 8mm of washers between the crossmember and where it bolts to... and an XF T5 tailshaft fits like a GLOVE! ...I shall report in to let you all know how it goes.... Cheers, Tony

 

[xrglen]

heh, it seems I have run into some trouble... whilst the flywheels I have are the same thickness. The heavy duty pressure plate appears to be far thicker than the standard one (who'd have thought??) But... the throwout fork is pushed really far forward and there is no free play in the unit... Looks like I'll have to rip the gearbox out and put the standard flywheel and clutch on again.... And oh how I struggled to get the box and motor all in in one piece.... DAMMIT!

when fitting a t-5 to a older motor you must use the t-5 trust bearing or you wont get any or little clutch adjustment and the padal with feel bad..

 

[L6]

heh, it seems I have run into some trouble... whilst the flywheels I have are the same thickness. The heavy duty pressure plate appears to be far thicker than the standard one (who'd have thought??) But... the throwout fork is pushed really far forward and there is no free play in the unit... Looks like I'll have to rip the gearbox out and put the standard flywheel and clutch on again.... And oh how I struggled to get the box and motor all in in one piece.... DAMMIT!

Not sure if this is relevant, but one more thing to contemplate.

Years ago had a new heavy duty clutch fitted to a V8 in a F250. The clutch “feelâ€￾ was terrible and after crawling under the vehicle noticed the push rod was on a weird angle as you describe.

After some investigation I discovered there were several release bearings of different thickness. This is to compensate for the different distance from flywheel face to release fingers for each clutch type so the fork will end up in the same place.

 

[2502vxw]

Cheers, I ended up getting the shits and putting in the standard 9.5 inch clutch again. I went to umpteen gearbox places, talked to umpteen "experts" on clutches and got no sense from anyone, just different opinions every time. One place thought the clutch was out of a holden T5 with it's high fingers and they could supply me with a ford one, but seeing as they wouldn't give me measurements over the phone or guarentee that it would work I ripped the T5 out, replaced the flywheel and clutch and bolted her back up again. Now it works like a champ! Good old 5 speed XW's... I like 'em!!!