Vilhuer

WSM gives two values for PSD wear on page 39-206a, new dimension 34.5mm and wear dimension 45.0mm. What exacly special tool 9514 measures when it's mounted in place of work cylinder (output cylinder in WSM)? Can 9514 be replaced with normal tools? Is this same as measuring with 9514?



It's little late now to check this as differential is already out. Would like to have ballpark number what result should be when gearbox is back together. Did open adjustment bolt (WSM calls it thrust bearing) in a way that nut didn't move. So it should be possible to install it back to original adjustment. How ever I would like to be able to check how worn plates are without spending fortune to factory special tools. There isn't 9514 measuring cylinder or 9508/1 measuring fixture in whole country so having check done by authorized dearer is out of question. They only want to sell complete new gearboxes anyway.

borland

Since the differential plate wear tool is not available, the only way to check the wear is by disassembling the locking mechanism and compare plate thickness with a new clutch plate. I'd think the allowable wear of the plate pack is the same would be read on the gage you can't get (10mm).

Also, since the WSM doesn't give instruction on setting the adjusment bolt (not shown in your photo) when installing new plates, you'll just have to assume the factory setting is correct and use that locktited setting.

If you moved the adjustment bolt, then you'll have to adjust it to make up the thrust bearing preload. I can't help you there.

Vilhuer

I did take adjustment bolt out but in a way that locking nut stayed in it's original position on the bolt. This should allow them to be put back to box case so that bolt pushes lever as much as before. While this makes setting all parts back to correct easy I would like to know distance from outside of box to inside like measured in picture. If result is in 34.5 to 45.0mm range 9514 is not needed to know how worn plates are.

borland

The WSM shows how to measure the depth of the adjusting bolt with a depth gage. Sounds like you'll be fine. But since you already have the unit out, might as well take the plates out of the housing and see what they are worn down to.

That way, you can reverse engineer the 9514 Tool. In other words, determine the wear and compare that to the 35.4mm to 45mm. Based on the wear you should be able to find the offset from your depth gage, if any, and calibrate an equivalent 9514 tool.

Vilhuer

Hi Borland,

I'll take entire gearbox apart and see what's in it. Will measure plates also. Thanks for the insight.

Vilhuer

Just note for myself mainly that 130k kilometers driven '90 GT depth measurement was 34mm and lenght from nut mounting surface to adjustment bolts end 24mm. I think 34mm is still within range considering measurement error but it would make sense if result were at least little larger than factory new value.

WSM says rubber bellows needs to be installed when measuring. This must mean either GT diff is in like new condition or 9514 measurement value is not directly transferable into depth gage mm's.

In any case, GT box bolt will go back together in same position it was before.

golfer_c

Hi, I have similar problem recently. And I posted here https://rennlist.com/forums/964-foru...nter-diff.html

Wondering did you find out how to replace 9514 with normal tool?

William

Vilhuer

Nothing new since 2007. Been occupied with other projects. I quess only sure way is to do total rebuild with new parts, do setup right and then measure how it looks from outside. If result is new dimension then mystery is definitelly solved. Other option is to loan correct tool and compare it with sliding scale.