I have a 78 with an automatic transmission. The rear transmission
seal is leaking a bit and was wondering what the typical cost is to
replace the rear seal and-or if this is something I could do myself?
I do not have a lift but do have some floor jacks.
I have done engine workd and brake work but nothing with the
Shouldn't be beyond what you say you've already done. Drop the drive
shaft, pull the seal and install new one, just a lip seal. Pay
attention to the wear on the yoke, if the wear is deep you may need to
replace it for the seal to fix the problem. GM number 24204540 seal
cost about $5. Can't confirm that as being the correct number, old
book, but the prices shouldn't be allot more. Wouldn't hurt to check
those u'joints while the shaft is out.
Oops, just checked Rockauto.com and they list 2 drive shaft sizes and
I think you have the THM 350, small shaft, 1.5 I.D.X 2.38 O.D. BCA
(National) Part # 9613S $1.95 the bigger shaft is 1.89 I.D. THM 400.
Forgot to tell you that you will get some fluid when you pull the
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