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post #1 of (permalink) Old 03-15-2001, 09:55 AM
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Oil Leak Rear Seal s10 4x4

I have a Winter Driver 84 S10 4X4 that is loosing a quart of oil a week out the rear seal. How difficult is this to fix in myself? I believe there are "kits available". I have pulled motors, done clutches, rear end swaps etc, but never done a rear seal replacement with the engine in the car. Looking at the Haynes manual it does not look easy. The dealers want $500 plus for the job. This truck is not my only car, so I am not worried about walking to work or anything and I have a garage and all the basic tools, etc. I am just wondering about the Pain in the a-- factor. Any opinions? Should I do the seal with the engine in the truck, or am I better off pulling the whole engine?

rexxshelby
84 s10 Blazer 4X4 2.8 5 Speed
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post #2 of (permalink) Old 03-16-2001, 09:28 AM
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Re: Oil Leak Rear Seal s10 4x4

I replaced my rear main seal about 3 months ago while the engine was still in the blazer. It was a little bit of work to get the tranny down. But I did it without taking the transfer case off the back of the tranny. If you do it with out taking the transfer case off you have to slide the tranny back and then lower the front of the tranny (this is when it helps to have a transmission jack). I replaced the seal, just to find out that the real culprit of the leak was a gasket that went to the remote oil filter(where the oil filter is located in a 2WD). Hope that helps.

NM4wheeler
'91 S10 Blazer
post #3 of (permalink) Old 03-28-2001, 10:36 AM
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Re: Oil Leak Rear Seal s10 4x4

Thanks NM4wheeler,
I am gonna try and dig into it this weekend. If any one else has done this job, please let me know. I just want to find out if I should do the seal from down low or just go ahead and pull the motor. Any replies are appreciated!!!

rexxshelby
84 s10 Blazer 4X4 2.8 5 Speed
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post #4 of (permalink) Old 04-10-2001, 10:09 PM
BigAl
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Re: Oil Leak Rear Seal s10 4x4

I replaced mine when I replaced the clutch. That involved taking down the transfer case, transmission, bell housing, etc. [img]/wwwthreads_images/icons/crazy.gif[/img] Probably easier than pulling the engine, unless you are going to do that anyway.

How did you get the trans off while leaving the transfer case there?

Thanks

Al [img]/wwwthreads_images/icons/smile.gif[/img]

'87 Jimmy 4X4 2.8L [img]/wwwthreads_images/icons/crazy.gif[/img]
post #5 of (permalink) Old 04-11-2001, 09:48 PM
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Re: Oil Leak Rear Seal s10 4x4

Well, The 5 speed is a PIA to free from the engine as the input shaft is pretty long, however as yours is an 84 it will have a 2 peice rear main seal which will be much easier to do. On my 85 when I pulled the engine, the t-case shifter bent the cab floor as I tried to slide the 5speed and the t-case back far enough to pull the engine(with a 3" body lift) I bet if you pulled the 5speed and t-case back, then lowered them on a floor jack, it would be super easy! Good Luck with it
A.Smith

1989 GMC S-15 4x4 4.3L/700R-4, 3.08s, 31" Sport Kings For Sale
1985 S-10 4x4 Soon to have 3504BM/TH350/D44/14FF, 35" Boggers
post #6 of (permalink) Old 04-20-2001, 04:17 PM
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Re: Oil Leak Rear Seal s10 4x4

Thanks for the Replies. I finally bought the rear seal (2 piece). According to the Haynes I am Looking at, I may not have to drop the t-5. We shall see. Please feel free to post any replies or suggestions.

rexxshelby
84 s10 Blazer 4X4 2.8 5 Speed
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