quaife owners important question?

[ilSHOu]

I just recieved my quaife today from another forum member and I had a question about it. I just wanted to make sure that there are only suppose to be 9 of the allen bolts as it looks like there should be 10 of them as there is another hole but i don't see threads in it unless it is broke off in there. My extensive searching only turned up one image from jedhead's cardomain page and in this image it looks as though his is the same way but wanted to double check.

Thanks, Seth

 

[shomesomesho]

Yes, there are only 9. I noticed that too and thought it was odd, but that's the way it is.

 

[ilSHOu]

Thank you!

 

[Power Surge]

Slight highjack here, but you already got your answer....

When changing the diff, do you have to "clearance" the diff/ring gear at all like you do with a rear end? Or do you just swap the diff and bolt it back in?

I've never done much with a FWD gearbox.

 

[ilSHOu]

I still have to do some research on the matter before I install mine, but I do know that you do have to set some clearances when installing. I would also be interested on the actual spec of this for my refrence.

 

[shomesomesho]

Slight highjack here, but you already got your answer....

When changing the diff, do you have to "clearance" the diff/ring gear at all like you do with a rear end? Or do you just swap the diff and bolt it back in?

I've never done much with a FWD gearbox.

Yes, you have to check the clearance and adjust it using diff shims if necessary. There is a special tool for this particular transmission to check said clearance.

 

[gmorrell]

Yes, you have to check the clearance and adjust it using diff shims if necessary. There is a special tool for this particular transmission to check said clearance.

There are no backlash specs, nor is there anything to set concerning clearance or backlash for the ring and pinion gears.

You do have to set differential bearing preload, there are printed procedures and videos available; search and yee shall find.

 

[shomesomesho]

You do have to set differential bearing preload, there are printed procedures and videos available; search and yee shall find.

Yes, that's what I meant to convey. SHO Nut sells a video that describes this procedure. I must have watched it over a dozen times.

 

[jedhead]

Also check for clearance between the bolts that hold the ring gear on the Quaife and IIRC third gear that will rotate over the bolts. I found that mine had contacted very lightly on the original tranny that blew up.
Josh will rent the tool that will measure what shim you may need. Be very careful with removing the shim from the original transmission because the shims are no longer available and you want to keep your old one incase you need it. In my case no shim was needed. I doubted myself so I have other check the shim gauge too. No shim needed. Of course I have save the shims from two transmissions just in case.
Get Josh's Quaife installation video. The video made things so much easier.

Bob

 

[SHOguy 92]

Sorry to hijack also but if just welding the diff do you have to mess with shims or clearance or is that just when installing a quaife?

 

[Shoaz]

Sorry to hijack also but if just welding the diff do you have to mess with shims or clearance or is that just when installing a quaife?

Any diff needs to be properly shimmed within the case; stock, quaife, welded, spool, whatever...

 

[Racer X]

So in short, if the case is ever opened, the diff needs to be shimmed, even if it's the same one going back in the same case?

 

[jedhead]

So in short, if the case is ever opened, the diff needs to be shimmed, even if it's the same one going back in the same case?

I would. Even if you are putting everything back in without change I would want to check shim to make sure that the preload isn't off because the roller bearings have worn some.

Bob

 

[TYSHO]

So in short, if the case is ever opened, the diff needs to be shimmed, even if it's the same one going back in the same case?

Nope.

 

[SHOguy 92]

Nope.

nope?

 

[GoofSHO]

Bob is saying...You should at least check the clearences to be sure. It looks like TYSHO is saying ...you don't need to shim. TYSHO may be correct, but I'd at least check. So, in a sense, both are correct.


B

 

[Shoaz]

A little further clarification: the diff -always- needs to be shimmed, but whether the shim needed will change if the same diff is replaced is debatable.

The wear issue cited by jedhead is, IMHO, a good reason to check and be prepared to change the shim even if the same diff is replaced.

 

[jedhead]

If you don't have the shim selector tool another way to measure the size of shim needed is to assemble the transmission with a coil of lead solder where the shim would reside. Take the transmission apart and measure the crushed thickness of the solder.

Bob

 

[gmorrell]

Reasons not to re-set (re-shim) the preload on any of the bearings in the MTX-IV, including the diff bearings:
1. The case was opened, nothing* was changed - no harm, no foul, no re-shim.

* "Nothing" here means differential body and shafts. Components on the shafts (gears, synchros, blocker rings...) can be changed without affecting bearing preload.

Reasons to re-set (re-shim) the preload on any of the bearings in the MTX-IV, including the diff bearings:
1. A case half was changed - re-shim everything.
2. A shaft bearing or bearings were changed - re-shim that shaft.
3. The diff or diff bearings were changed - re-shim the diff
4. A shaft was changed - re-shim that shaft.

If a tapered roller bearing is worn enough to require re-setting its preload, it will be painfully visibly obvious to you that you should replace the bearing.

Gary M.

 

[shomesomesho]

Reasons not to re-set (re-shim) the preload on any of the bearings in the MTX-IV, including the diff bearings:
1. The case was opened, nothing* was changed - no harm, no foul, no re-shim.

* "Nothing" here means differential body and shafts. Components on the shafts (gears, synchros, blocker rings...) can be changed without affecting bearing preload.

Reasons to re-set (re-shim) the preload on any of the bearings in the MTX-IV, including the diff bearings:
1. A case half was changed - re-shim everything.
2. A bearing was changed - re-shim that shaft.
3. The diff or diff bearings were changed - re-shim the diff
4. A shaft was changed - re-shim that shaft.

If a tapered roller bearing is worn enough to require re-setting its preload, it will be painfully visibly obvious to you that you should replace the bearing.

Gary M.

If you have a shaft shot-peened, do you have to re-shim that shaft?