first gear pop's out hard!

[loverboy]

Every so often when im releasing off the clutch when stoped at the lights the transmition pops out of first with a very loud bang. The clutch is all the way down and the car is at a complete stop. I was wondering what the problem is and what parts need to be changed go fix it. Thanks!

 

[MMM]

The cause of the problem is first gear is not completely engaged when you release the clutch. In a modern, full synchromesh transmission, the only gear that is not in constant mesh (and slides back and forth for engagement/disengagement) is reverse. So what engages the gears? sliding blocks usually known as clutch or synchro hubs. What they engage is a set of very narrow teeth that are part of the synchromesh assembly for each gear. Actual engagement/disengagement is less than 1/4 inch. Therefore shift linkage adjustment is critical. The forward edge of the engagement teeth are usually beveled, as are the edges of the teeth in the synchro hubs, So if these teeth are not fully engaged, and both beveled edges are all that is touching, the transmission will jump out of gear with a loud pop as soon as power is applied.
So check your linkage to assure you are getting full travel. I would bet you are not and this is your problem. If you are getting full travel then the problem could be one of any number (shift fork issues, synchro hub, worn engagement teeth) INSIDE the transmission which will require removal and disassembly of the unit.
Mike

 

[ArctecH]

I've got a similar problem with mine. If this problem is internal, how much would it cost to repair, approximately?

 

[loverboy]

Thanks mike I will be taking the car to the dealer for warranty work as soon as it gets out of storage. Im hoping that they will not create more problems if they go as far as taking apart the tranny to find the problem. Thanks Again!

 

[djengr]

I've got a similar problem with mine. If this problem is internal, how much would it cost to repair, approximately?

I too have been living with a similar issue. A local shop in Okc that does these said it would be around $1,000 for labor and depending on parts needed said it could be about $500, then you got to look at the clutch and slave while you have the drive line out. I have seen estimates in this forum in the neighborhood of $3K from a dealer.

Good luck.