78novacaine

iTrader: (2)

so can anyone tell me exactly what is wrong here, i am pretty sure it is an internal tranny issue anytime i shift into fourth at WOT, or actually anything above 2k rpms, it pops right out of gear, doesn't do it in normal driving, and there is no grinding noise, it just pops right out. also, if i am in 4th, put in the clutch, rev to 1800+ rpms, and pop the clutch, it will pop out as well. any ideas?

85MikeTPI

iTrader: (9)

Possibly a bent 3/4 shift fork, or the synchro keys. The fork is more likely since you're not having issues with 3rd.

thesource

iTrader: (60)

I would start by checking the tip of the input shaft for wear and changing the pilot bearing in the crank shaft . I just did one the other day with a similiar issue and I had already rebuilt it before with the upgraded fork , billet keys and bronze pads so I knew that wasn't an issue . I ended up changing the 3-4 slider and the input shaft because I could see some taper going on in the area where the slider locks on to the gear and figured that was the issue . I called the shop the other day to confirm that fixed it and they said so far so good .

78novacaine

iTrader: (2)

well, my pilot bearing has been making a lot of noise, and i have that along with my ls7 clutch kit ready for install, i just thought that since it only does it in 1 gear, that the pilot isn't the issue, and no use going thru all the trouble of installing the new clutch/pilot if i am gonna have to drop the tranny again right after to fix this issue

78novacaine

iTrader: (2)

well, it took long enough, but i finally got the new clutch and pilot in. when we pulled the stock clutch, the old pilot bearing had literally turned to dust, there was just the inner and outer rings, and that was it. i am very surprised that the tranny was still shifting at all, and there seems to be no problems with about 200 miles on the new clutch and pilot