I have an 86 5.0 automatic and am trying to find out what rear is in it. The axle tag is 3SL27A886F03 and what does this mean. I think it has 3.27 gear and looking at putting 3.73. Will I notice a difference by doing this?
yes you will notice a difference in acceleration
at 60 mph your tach will be about 300 rpm higher
You will need to buy a different speedo gear to compensate and keep your speedometer somewhat accurate- LMRS and Steeda have the calculator and correct speedo gear.
your AOD will also shift sooner in the powerband and the TV cable will need to be adjusted or an aftermarket valve body
I would also buy the largest plate trans cooler you can fit in front of the radiator
Fwiw, I drove my 89 daily for 2-3 years with 4.10's and AOD. 3.73's would be good IMHO. But to be fair, it did have a mild built trans and converter. If you like the extra gear and sacrifice mileage, 4.10's. I drove it gentle and preferred the shifting early.
Fwiw, I drove my 89 daily for 2-3 years with 4.10's and AOD. 3.73's would be good IMHO. But to be fair, it did have a mild built trans and converter. If you like the extra gear and sacrifice mileage, 4.10's. I drove it gentle and preferred the shifting early.
EDIT: Apparently there's a better way using a gauge so recommend following that procedure:
There's no tool that I used but I would get the brass/bronze bushing and clip to replace the the rubber bushing. I followed this procedure and it had held up fine for the 2-3 years I drove it every day 50-60 miles and the new owner until he passed away drove it regularly with a SC trim on it.