2G Manual Tranny won't shift into 4th?

Cameron R · Nov 20, 2017

Recently bought a 96 gsx and the 4th gear stopped working. grinds when I try to put in gear. every other gear seems to work great. any suggestions?

dustyboner · Nov 20, 2017

does it go into 4th gear okay when the car isn not running?

Cameron R · Nov 20, 2017

U

dustyboner said:
does it go into 4th gear okay when the car isn not running?

Yes, seems to just fine.

dustyboner · Nov 20, 2017

trannys aren't really my thing but im gonna say its the syncros or shift fork. Drain the fluid and if it looks like its got gold glitter in it, your syncros are probably trashed.
If it looks kinda like radiator stop leak, (silvery), put a magnet to it. if you get hella shit sticking to it, the teeth on your gear could be fuct. but that usually makes it pop out of gear

pauleyman · Nov 21, 2017

Can you rev match it? Did you adjust the clutch?

Cameron R · Nov 21, 2017

pauleyman said:
Can you rev match it? Did you adjust the clutch?

Haven’t messed with much yet, and I can rev match but I can’t actually put it in 4th so I just blip throttle going into 5th

cano86 · Nov 21, 2017

Sounds like a damaged 4th gear synchro and/or Slider, I had that in mine but was the 1st gear, had to order one through jacks.

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Cameron R · Nov 21, 2017

cano86 said:
Sounds like a damaged 4th gear synchro and/or Slider, I had that in mine but was the 1st gear, had to order one through jacks.
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Link to where you ordered yours? Just got the car so don’t know where to find anything yet. Certified transmission can’t help me they said

cano86 · Nov 21, 2017

Here's a link, just know those Transmissions have to be properly shimmed after rebuild, if you are going to have someone do it is wise to open it up first and do a full inspection.

When I did mine the only problem I was experiencing was no 1st gear engagement, but when I opened it, ended up installing all new synchros, bearings, 1-2 fork, 3-4 fork, and the 1st gear hub & slider which was my main problem but the other replaced parts were worned.

https://www.jackstransmissions.com/collections/awd-input

Cameron R · Nov 21, 2017

cano86 said:
Here's a link, just know those Transmissions have to be properly shimmed after rebuild, if you are going to have someone do it is wise to open it up first and do a full inspection.

When I did mine the only problem I was experiencing was no 1st gear engagement, but when I opened it, ended up installing all new synchros, bearings, 1-2 fork, 3-4 fork, and the 1st gear hub & slider which was my main problem but the other replaced parts were worned.

https://www.jackstransmissions.com/collections/awd-input

I’ve never worked on a transmission, is it difficult or?

luv2rallye · Nov 21, 2017

Don't let others on here snow you into thinking it's easy (which ALL guys who have done it on here will say). I've rebuilt mine (never having done one before), but it's not for the timid or for those not willing to spend the time and effort (being retired I had lots of time) or following the FSM. Setting bearing preloads/endplay is crucial (and all tranny shops I've talked to won't take the time/effort to even do that, which is why I rebuilt mine after a tranny shop both screwed it up and didn't do the bearing preloads). You'll need a press and bearing separator. Here's a great article on how to do it: http://web.archive.org/web/20100627174759/http://www.twingles.com/ideck/rebuild3/dretranny.htm

cano86 · Nov 21, 2017

Cameron R said:
I’ve never worked on a transmission, is it difficult or?

Yes it is, if you have never worked on a transmission is not something you want to dive into without much understanding knowledge.

luv2rallye said:
Don't let others on here snow you into thinking it's easy (which ALL guys who have done it on here will say). I've rebuilt mine (never having done one before), but it's not for the timid or for those not willing to spend the time and effort (being retired I had lots of time) or following the FSM. Setting bearing preloads/endplay is crucial (and all tranny shops I've talked to won't take the time/effort to even do that, which is why I rebuilt mine after a tranny shop both screwed it up and didn't do the bearing preloads). You'll need a press and bearing separator. Here's a great article on how to do it: http://web.archive.org/web/20100627174759/http://www.twingles.com/ideck/rebuild3/dretranny.htm

What you stated is correct, it is not an easy task and not something to venture without experience.

pauleyman · Nov 21, 2017

Cameron R said:
I’ve never worked on a transmission, is it difficult or?

Dsm was the first transmission I had ever done. It is not easy. I went in considering myself a very competent mechanic having built motors and made most major repairs to many cars. I was confident it was done right but i also own many tools and have 30 years experience with cars. If you fit a similar description you may want to consider the work on your own. If you've never even done a brake job, no way.

93AWDDSM · Nov 22, 2017

A vendor on here would love to fix that transmission up for you! Get it rebuilt and call it a day. Replacing one part when they are all equally worn is no bueno.

Or search the classifieds for possible part outs.

LilRedSpyder · May 3, 2019

I also am having trouble getting mine into 4th gear. Normal shifting it doesn’t wanna go but if I pull it a lil harder than normal, hold it and ease off the clutch it’ll stay in gear....

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