Tranny

[mooner7]

Hi,

I was wondering how to identify which transmission is in my 1981 Silverado, it has a 5 L engine and tranny has 1,2,3,D,N,R,P.

Thanks

[beave84]

Hi,

I was wondering how to identify which transmission is in my 1981 Silverado, it has a 5 L engine and tranny has 1,2,3,D,N,R,P.

Thanks

 

 

Look in your glove box at the RPO sticker, It has a bunch of 3 digit codes of numbers and letters, it should have one that says MX0, if thats the orignal transmisson. It a TH700. If it has MX1 then it came with a TH350 which was a 3 speed and means it was changed then you'd need to look at the pan to tell because there was a TH200 also that someone could have put in. Hope this helps. Let me know what you find.

[radiator]

If it has 1,2,3, and drive then it would probably be a 4 speed which would be a 700R4.

[GMstrong]

700r4..200r4 were used in cars.,Look at your pan it will say everything or the rpo if you can read it.

[beave84]

700r4..200r4 were used in cars.,Look at your pan it will say everything or the rpo if you can read it.

 

 

TH200 were in cars but could be have been swapped was my point.

[GMstrong]

pointless swap.

[beave84]

pointless swap.

 

 

Yep..but I've seen worse and being that it's a 30 year old truck anything is possible.

[thebandnerd03]

123dnrp is a 3 speed tranny. in the 81 its either a th350 or a th400. the 700r4 have an over drive and came on only the 4x4.

[GMstrong]

Thats funny that you sad that because my 90 gmc has a 700r4 and i only have 1,2.

[beave84]

Maybe I'm not counting right but 1st 2nd 3rd and drive = a four speed and an RPO code of MX0 is a TH700. Every turbo 350 I've worked on only has 1st 2nd drive which is a 3 speed.

[GMstrong]

Well i can tell you right now that my truck came out factory with the 700r4 and still has it in there and only has 1 and 2.and count 3 soild gears with od

[beave84]

Well i can tell you right now that my truck came out factory with the 700r4 and still has it in there and only has 1 and 2.and count 3 soild gears with od

 

 

So that'd be a four speed.I have at least three turbo 350's in the basement and a few 700's out of my drag truck.. 3 forward gears... three speed......four forward gears...four speed. but hey think what you want its a free country

[LeoS41280]

This argument is pointless because i believe that the 700r didn't come out till 1982.At least the info I'm seeing lists 82 as the first year. And when it did come out I doubt if it would have came with a 305. Possible it's not the original engine. The OP does not say 2 or 4 wheel drive, and he may be mistaken about a 3 in the gear selector. My guess would be that is's a TH350. With 3 fwd gears.

[beave84]

This argument is pointless because i believe that the 700r didn't come out till 1982.At least the info I'm seeing lists 82 as the first year. And when it did come out I doubt if it would have came with a 305. Possible it's not the original engine. The OP does not say 2 or 4 wheel drive, and he may be mistaken about a 3 in the gear selector. My guess would be that is's a TH350. With 3 fwd gears.

 

 

Your right it was introduced in 81 as an 82 model year.It came in 2 and 4wd trucks and was mated to everything from the 262 to the 400. I stated before it may have been changed to the 700r4 or it could have been a 200r4 since it has a universal bolt patteren. I know the 200 was a car tranny but like I said in 30 years who knows what was stuck in and I said to use the pan to identify it, then the bullshit ****ing bullshit started. So we'll just leave it to the mods.

[GMstrong]

Bullshit started where?Im not trying to start nothing since its pointless over the computer.Could be any kind of tranny could be any kind of motor.Bottom line is if you really want to know what kind of tranny it is look at the pan or the RPO code like the above posts say.Boooom.