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idle problem[700/91] posted by kevin walsh on
Tuesday, 13 July 1999, at 6:00 p.m.
my 91 745 non-turbo idles ok at idle in neutral BUT in gear(A/T)theres a harsh vibration in the steering wheel and shifter. Its got 108K miles and tuned up. any help would be appreciated.
Re: idle problem[700/91] posted by Don Foster on
Tuesday, 13 July 1999, at 6:33 p.m.
Kevin --
You might be having trouble with the hydraulic motor mounts. 'Though the mileage is a bit low for it, the age is about right for replacement.
When one or both mounts fail, they collapse. This allows the oil pan to contact the crossmember, and considerable engine vibration is transmitted to the car. Generally, this is most noticeable at higher engine/vehicle speeds, and might be described as "buzziness".
Check the clearance between the pan and crossmember -- it should be about 3/4" -- any less, and you may have a mount on the way out.
Replacement mounts are available from many sources (including the dealer) but I'd suggest you start with the folks who advertise on the BB -- RPR, IPD, etc.