Bad vibration, what could it be?

[E30Kohl]

It only happens between 2600 and 3100 rpms and only in 1st gear, I was thinking guibo, but then my transmission mounts gave and the tranny is 3 inches lower than its supposed to be. Any ideas on what it could be?

[nando]

but then my transmission mounts gave and the tranny is 3 inches lower than its supposed to be.

uhm, maybe that?

[charlescho]

uhm, maybe that?

[E30Kohl]

Haha, it had the vibration a couple weeks before the transmission actually fell, I haven't driven it since then.

[Liam]

Do the trans mounts and see what happens, they are cheap and easy.

[Jparkr]

Do the trans mounts and see what happens, they are cheap and easy.

Nothing is easy for Kohl

[Jesse30]

your starter wiring is backwards and everytime your in first between 2600 and 3100 rpms it hyper grounds your electrical system and causes it to run your starter in reverse. thus spinning your transmission in the tunnel making a thud against your floorpan.

[BrewCity11]

your starter wiring is backwards and everytime your in first between 2600 and 3100 rpms it hyper grounds your electrical system and causes it to run your starter in reverse. thus spinning your transmission in the tunnel making a thud against your floorpan.

Very convincing story. Had to read it twice and might possibly read again.