1992 GMC Yukon 2 Door

[pedwar0728]

I recently purchased a 1992 GMC Yukon. It has a 5 speed manual and the 5.7 V8. I was told it was pretty rare when I bought it and i was just wondering if anyone can verify that? Also if it shares transmissions with any other vehicles as I believe mine is on the way out.

 

[Joseph Garcia]

@OR VietVet

 

[OR VietVet]

Have no idea how rare that rig could be unless of course it is in primo shape and low miles but what makes it desirable to me, IMO, is the manual transmission. I think I saw one Tahoe/Yukon of that vintage and manual transmission in my shops over the years. If I was you, I would start the search for a quality transmission shop and have the one you have rebuilt, if in fact it is on the way out. What makes you say that? I would think any pickup truck of that same style would have a transmission that would swap in but you have no idea of the time left on that transmission either. Where is this Yukon at and do you ever park it outside and leave it when you are away from the house......

By the way, welcome to the forum.

 

[97YukonNZ]

Hi and welcome to the forum.

A 5 speed sounds very rare. I would have expected a 4 speed maybe a Muncie.
Is it a 4 wheel drive rig?
Would love to see some pics of it.
Cheers

 

[OR VietVet]

Hi and welcome to the forum.

A 5 speed sounds very rare. I would have expected a 4 speed maybe a Muncie.
Is it a 4 wheel drive rig?
Would love to see some pics of it.
Cheers

Did they even come out of the factory with 5 speeds? Maybe someone did a transmission swap at some point and looks stock. Hell, I don't know.

 

[pedwar0728]

Right now I'm trying to figure out if it's a trans or a clutch, it has a very hard shift into first when stopped but when rolling it shifts pretty easily. It also grinds when going into reverse unless you go from 5th/OD to reverse. It's got 250,000 and is far from pristine but it is a pretty nice first car.

 

[pedwar0728]

Did they even come out of the factory with 5 speeds? Maybe someone did a transmission swap at some point and looks stock. Hell, I don't know.

I did a vin lookup and it shows that it came with a manual so as far as I can tell it's original.

 

[OR VietVet]

Right now I'm trying to figure out if it's a trans or a clutch, it has a very hard shift into first when stopped but when rolling it shifts pretty easily. It also grinds when going into reverse unless you go from 5th/OD to reverse. It's got 250,000 and is far from pristine but it is a pretty nice first car.

IMO, that is either normal or a problem with the clutch. May just be adjustment or the normal 1st gear and reverse gear synchronizers being what they are. Did it always do that since you bought it or did it start after you bought it? If you double clutch it, does that make a difference? Have you looked at a sample of the fluid to see if has any debris/metal in it? Have you tried doing a fluid drain and flush and refill with fresh fluid? Basics first....

 

[OR VietVet]

I did a vin lookup and it shows that it came with a manual so as far as I can tell it's original.

Comes with manual, I get that, but with a manual 4 speed or 5 speed or does it not break it down like that. I think you can go to a Chevy Forum and punch in the entire VIN and it will pull up a build sheet and tell you which transmission it came with.

 

[pedwar0728]

Comes with manual, I get that, but with a manual 4 speed or 5 speed or does it not break it down like that. I think you can go to a Chevy Forum and punch in the entire VIN and it will pull up a build sheet and tell you which transmission it came with.

It's a 4 speed with overdrive. Just bought it yesterday and it started doing it on the way home. Haven't check fluid or anything like that just cause its a pain to drain the trans.

 

[OR VietVet]

So, initial roadtest before buying did not do this but now started doing it on the way home? Check fluid as stated and no matter what a pain it is, drain and refill and flush if looks to need it. May also just be an adjustment but I have driven many a manual transmission truck where the synchros were pretty stiff when going in first and reverse.

 

[97YukonNZ]

It's a 4 speed with overdrive. Just bought it yesterday and it started doing it on the way home. Haven't check fluid or anything like that just cause its a pain to drain the trans.

It is a pain to do the drain but for that reasòn it may not have been done by previous owners. A definite must do!
Sounds like synchro meshing is out if getting graunch and hard 1st gear.

 

[exp500]

My bet is on a bad clutch master or slave. 89's were bad and I think these are the same.

 

[OR VietVet]

My bet is on a bad clutch master or slave. 89's were bad and I think these are the same.

Easy enough to check for leakage at both of these.

 

[Eman85]

I worked at a GMC dealer back then I remember 1 like that coming through the dealership. As for hard to get into gear and grinding putting it in reverse it sounds like a clutch problem. Obviously on a 30yo vehicle with 250k there's a lot of wear. If I remember correctly that has an external slave cylinder so replacement and checking is easy. If you do a clutch there are some things to check and or replace. If it does have the external slave cylinder it will have a clutch fork, buy a new one. It will also have a ball that the fork pivots on, buy a new one of those too. In those years there was a bulletin and a replacement ball. You drill and tap the bellhousing for a grease fitting and press a new greaseable ball in. I remember doing these under warranty for a chirping sound or a squeak.

 

[mwswarrior]

They are pretty rare. Not many out there. I had a '93 C1500 Extended Cab with the 5.7 and a 5-sp. I hot-rodded it a bit with under-drive pulleys, chip, headers, exhaust, HE ignition, etc and beefed up the tranny and clutch a bit. It was a blast to drive. One of the trucks I wish I could have kept!

Looks like the Tranny is a RMT290C-3 - HM290

 

[YukonGTmaster]

Pictures!?

 

[pedwar0728]

Sorry for the late response, life happened. Upon further inspection the slave cylinder is leaking. I've ordered a new one and will install it when I have time. It is a 4wd, it does get parked outside, and the previous owners put a Chevy grill on it for some reason.

 

[pedwar0728]

I worked at a GMC dealer back then I remember 1 like that coming through the dealership. As for hard to get into gear and grinding putting it in reverse it sounds like a clutch problem. Obviously on a 30yo vehicle with 250k there's a lot of wear. If I remember correctly that has an external slave cylinder so replacement and checking is easy. If you do a clutch there are some things to check and or replace. If it does have the external slave cylinder it will have a clutch fork, buy a new one. It will also have a ball that the fork pivots on, buy a new one of those too. In those years there was a bulletin and a replacement ball. You drill and tap the bellhousing for a grease fitting and press a new greaseable ball in. I remember doing these under warranty for a chirping sound or a squeak.

It already has the grease fitting installed, I added grease to it but it didn't do anything.