Hey guys, you know that DSM's aare notorious for breaking trannies. It isn't because they are weak, it's because of how they are driven.

Transmission Diagnostics.

Gear Clash (Grinding noise when shifting):

a) Worn blocker rings (This is part of the synchronizer assembly).

b) Clutch not disengaging properly

Clicking Noise (Heard in one single gear with the vehicle in motion).

a) Broken or chipped part of gear tooth (It can be on the main gear, on the countershaft(clutch shaft) or output shaft (main shaft).

Generally Noisy (In all forward speeds)

a) Low lubricant or incorrect lubricant
b) Transmission not securely mounted

Growling Noise (With clutch engaged and transmission in neutral -- will also be heard on acceleration as a steadily increasing whirring).

a) Worn or faulty input shaft(Clutch shaft, main drive gear) bearing

Growling Noise (With the vehicle moving in all gears).

a) Worn or defective countershaft or bearings

Growling Noise (Heard in all gear ranges except 4-5.

a) Roller bearings that supports the main shaft at the front that is in the rear of the input shaft. These are either damaged or were missing (If you overhauled your transmission and forgot to put these back in).

Violent Banging/shudder (Heard and felt in the vehicle just starts to move--- this is caused by abuse).

a) Broken main drive gear teeth.
b) Broken main clutch gear teeth.

Slips or jumps out of gear (Visually occures on acceleration and deceleration.

a) Loose synchro hub on the main shaft splines.
b) Worn synchro insert grooves on the synchronizer sleeve.

c) Bearing at the front of the main shaft disintegrated causing the shaft to wobble.

d) Worn detent mechanism

e) Worn thrust washers/helical gear axial movement.


Anyway, those are the basics. So if you are having any of these issues, consider this write up.

Jesse