1990 S-10 Blazer 4X4 5 Speed Manual Tanny

[probe713]

My 1990 s-10 RPO code show I have a MM5 manual transmission. I am trying to find a replacement but not lucky so far. I heard that other car manufacturers have use this transmission. Is it true? In what car was it used. I'm trying to be conservative here. Rebuilt is to much. Thanks

[OverBoardProject]

Don't buy one out of another make.
They might be the same basic transmission, however they susally use different input and output shafts.
And there is a good chance that the bell housing bolt pattern might be different too

[probe713]

Thanks OB. I guessed I'm back to square one. I really would like to try open it myself and check out what's wrong with it.

[OverBoardProject]

Tell us what it's doing, we might be able to narrow it down and tell you if you have a good chance to be able to fix it

How close do you live to the Canadian Border?, if you live close to a crossing it might be worth it to look up north for a transmission. They should be duty free, just pay the border tax and get the canadian tax back.
I can probably PM you a few names and phone numbers

[crazycory1]

try

www.car-part.com

Its you best shot even if you have to have it shipped.

[probe713]

Thanks again OB. I am about 3 hours from the Vancouver border. I will try to check out that website you shared. My transmission grinds on first and second gear. After that it will be okay. I also notice after I took it down that there is a play on the main shaft if you try to pull it up and down. But so far if you shift it to first gear and turn it by hand, I don't hear any but the normal sound of two gears turning. But then again this is at no load.

[probe713]

OB, Thanks for the advice. They listed is as available and is cheaper than what I thought. I'm driving out there to check it out this Friday. I'll give you an update.