shifter bobbing up and down on accel

[LGAFF]

Going to recheck the C-beam bolts, but under hard accel the shifter is moving up about 1/2" maybe more....any other possibilities? This is on the 90...pretty confident I torqued to 37 and 59

[XfireZ51]

Originally Posted by LGAFF

Going to recheck the C-beam bolts, but under hard accel the shifter is moving up about 1/2" maybe more....any other possibilities? This is on the 90...pretty confident I torqued to 37 and 59

Does it have the Beam plates?

[VetteMed]

Lee, I had the same problem when I didn't completely clean the mating surfaces of the C-beam and of the transmission and differential. The bolts were torqued properly, but a few bits of the OEM adhesive were preventing flush fitment.

Of course, a worn or broken motor mount or batwing mount can do the same thing. But, if you've had the c-beam off recently, I'd want to check that there's no adhesive or debris preventing proper mating.

[scottfab]

Originally Posted by LGAFF

Going to recheck the C-beam bolts, but under hard accel the shifter is moving up about 1/2" maybe more....any other possibilities? This is on the 90...pretty confident I torqued to 37 and 59

Yah, re-tighten bolts but check trans cross member and motor mounts too.

[Paul Workman]

Originally Posted by scottfab

Yah, re-tighten bolts but check trans cross member and motor mounts too.

No trans "cross member" on a ZR-1 (ZF) transmission. That leaves motor mounts, C-beam joints, and the "bat wing" bushings on the differential. Ya have ta go back to C3s to come across cross members for the trans.

P.

[LGAFF]

Loos beam bolts.....surprised as my torque wrench was still set for them, and I used the 02 wrench to tighten...hopefully problem solved

did manage to take a nice 21MM deep socket to the eye

[rhipsher]

Lol! I took a Spicer Ujoint cap to the fore head while installing. I bled like a siv.

[scottfab]

Originally Posted by Paul Workman

No trans "cross member" on a ZR-1 (ZF) transmission. That leaves motor mounts, C-beam joints, and the "bat wing" bushings on the differential. Ya have ta go back to C3s to come across cross members for the trans.

P.

Yup and my C3 had one. Brain fade. It's all that bike riding and fresh air. Well that and I haven't had to do anything under there since I rebuilt my ZF6.

[-=Jeff=-]

Originally Posted by LGAFF

Loos beam bolts.....surprised as my torque wrench was still set for them, and I used the 02 wrench to tighten...hopefully problem solved

did manage to take a nice 21MM deep socket to the eye

you leave your torque wrench set? I always Zero it out after use..

but yeah not surprised the bolts were loose

[scottfab]

Originally Posted by -=Jeff=-

you leave your torque wrench set? I always Zero it out after use..

but yeah not surprised the bolts were loose

I loosen it also. Leaving it set is suppose to negatively effect the accuracy.