Good or bad: synchro, pad fork picture

[135sohc]

5th doesnt take as much abuse like 1-4 but could this be a sign of good things ? Not sure whats considered 'worn' vs the standard new spec.

[BadAssPerformance]

Was it having 5th gear issues? I would say looks OK, but hard to know for sure with them still installed.

[135sohc]

Was told it was running well without issues. I'm just doing a clean up, new seals, resealing the anerobic portions and checking the specs w/dial indicator before dropping it in the car.

[turbo84voyager]

Looks good from what I can see, I would run it. I have never seen an actuial spec for these, I am sure there is. Is there slop in the fork? If not leave it alone. 1-2 usuially takes the most beating atleast from my experience.

[135sohc]

So some awesome grey sparkled 'stuff' was flowing out as I opened it up. which led me to further digging deeper... And what did I find???!!!









Found the aluminum source and something even better Even without the 'ears' arnt those pinion shafts supposed to be secured with a roll pin ? She was walkin' and its not midnight yet...

looks like two new diff bearings and figure out what to do with this mess at the minimum.

[turbovanman²]

The shift pad looks a bit iffy but from the pic you've posted, the pointy synchro bits look good,

You were supposed to remove the roll pin when using those ears, but I still like to use the roll pin, stops the shaft from wearing out the diff housing.

[135sohc]

Those 'ear' things were a joke, neither one fit tightly against the housing, both were cracked and the one was cutting the transmission case from where the pin was pushing on it and bending it out, dont think they were the mopar made pieces.

[135sohc]

And the unplanned for but I'm glad I did now tear-down with pictures since we all like those.


3-4 fork & pads





3-4 cluster assembly





1st


2nd


smooth with the finger nail test.


Seems very undersized for the load it takes ?



1-2 fork & pads. little metal embedded and some side gouges. I may swap these for a set from another transmission or maybe just swap with 5th ?







I'll be replacing both input shaft bearings and find some 3-4 fork pads (there not NS1 yet I hope ?) at the minimum. And probably buying the 'bearing and synchro' kit and seeing what it comes with. Oil slinger behind the I-shaft front bearing is snug in the case still so thats I good thing I guess..

[onerippinturbo2]

if you need the natural colored pads i have new ones. i also have black ones too just no grey ones.

[135sohc]

if you need the natural colored pads i have new ones. i also have black ones too just no grey ones.

for a 523/568 ?

[Ondonti]

Even if OEM is ns1, can you get some from an aftermarket trans parts supplier?

[135sohc]

Even if OEM is ns1, can you get some from an aftermarket trans parts supplier?

All of the aftermarket "kits" contain nothing more than what can still be had from chrysler/aftermarket because they are either buying it from chrysler or the companies who made it for chrysler originally.

[135sohc]

Some more questions. According to the 90 and 91 parts catalogs the 1-2 and 5th gear synchro assemblys are different between the two years. All other components related to them like the fork and pads are the same right down to the p/n listed and having both a 90 and 91 sets of parts here that checks out ok. But when doing a side by side comparison of the 1-2 & 5th clusters the synchro portion looks identical in every possible way even switching parts around everything goes together and functions like normal. I dont remember the build date for the 91 set of parts but it is a large spline input so its certainly a '91' model year transmission as far as production goes.

[BadAssPerformance]

I used some 90 parts to fix my 91 the last time I had it out. I used 2nd, 3rd and 4th gears and a 2nd gear stop ring. I did not notice any differences between any of those parts but did see some slight differences in the pad material on the stop rings in the spare parts box. I did not notice any differences in the syncro rings but didnt use and so didnt look as hard at them. I did however notice that the 91 3/4 fork was a tiny little bit beefier.

[135sohc]

Good to hear.

[135sohc]

1st gear blocker ring. Is there a published wear spec for these ?

[BadAssPerformance]

No idea what the spec ism, but it looks OK to me but 1st usually does unless you downshift hard a bunch. How does 2nd gear look?

[135sohc]

Same condition overall.

Last night to waste time I took the rest of the assembly apart to closely inspect each gear. 1-3rd and to a lesser extent 4th were just plain nasty IMO though. Excessive 'normal' wear and a few broken teeth on both 2 and 3.

Has anyone ever thought about getting the teeth welded up and reshaped to replace whats worn off ?

[BadAssPerformance]

I wish there was a way! Its hard to do that to heat treated steel.

[shackwrrr]

you can reshape them with a small file, Just make them pointy again and they will be good. No need to add material.