what auto tranny came in the 87 suburban? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

CB24 · 01-28-2010, 03:29 PM

Sorry guys but I can't seem to find the answer anywhere. What auto tranny came in the 1987 2wd suburban? Is there an online resource I can use in the future for questions like this?

Thanks

Mr.Chevy4x4 · 01-28-2010, 07:06 PM

1/2 or 3/4 ton?

The vast majority of the 1/2 tons came with the 700r4 overdrive transmission, but the turbo 350 with the lockup converter was an option. The 3/4 ton suburbans would have had a turbo 400 behind a 454 or 350 engines , and could have had the 700r4 with the 350 engine.

Get under it and look at the transmission pan. If it is completely square it is a 700r4, if it is square with one corner cut off at an angle it is a turbo 350, and if it is no where near square it is a turbo 400.

Mike

CB24 · 01-28-2010, 07:20 PM

Its a 1/2 ton with a 305 v8. I'll crawl under it when I get home. Thanks for the response.

Daggar · 01-28-2010, 09:16 PM

Quote:

Originally Posted by CB24

Its a 1/2 ton with a 305 v8. I'll crawl under it when I get home. Thanks for the response.

No need to crawl under. If your gear indicator is PRN (D) D 21 then you have the 700 R4

If it's PRND21 and you have a 1/2 ton then you have a TH350
If it's PRND21 and you have a 3/4 ton then you probably have the TH400

Yours I bet has the TH350 as you say it only has a 305 in it which was the base level burb in 1987.

Mr.Chevy4x4 · 01-28-2010, 10:01 PM

I had an '87 with the TBI 305 and 700r4. It was a stripper with vinyl, but it did have overdrive. They did some crazy stuff back then. I have a '87 SWB 4x4 stepside that is a Silverado. It came from the factory with power windows and manual locks. Only one I've ever seen that way. I know it's factory since I've known the truck since new.

CB24 · 01-28-2010, 10:17 PM

Daggar, you made that too easy, hahaha.

Its a 700r4 which is cool because I bought the truck for the front suspension for my 69' c10 & the gas tank. Now I can use the tranny too after a rebuild.

Thanks for the help guys.

Jonboy · 01-29-2010, 09:59 AM

Could you get a 305 in a Sub? I thought the 350 was standard.

Daggar · 01-29-2010, 02:05 PM

305 was available until 1987. In 1988 the 350 became standard equipment.

01-28-2010, 03:29 PM	#1
CB24 Registered User Join Date: Jul 2009 Location: Surprise, AZ Posts: 138	what auto tranny came in the 87 suburban? Sorry guys but I can't seem to find the answer anywhere. What auto tranny came in the 1987 2wd suburban? Is there an online resource I can use in the future for questions like this? Thanks Last edited by CB24; 01-28-2010 at 03:31 PM.

01-28-2010, 07:06 PM	#2
Mr.Chevy4x4 Registered User Join Date: Jul 2007 Location: Sims, NC Posts: 531	Re: what auto tranny came in the 87 suburban? 1/2 or 3/4 ton? The vast majority of the 1/2 tons came with the 700r4 overdrive transmission, but the turbo 350 with the lockup converter was an option. The 3/4 ton suburbans would have had a turbo 400 behind a 454 or 350 engines , and could have had the 700r4 with the 350 engine. Get under it and look at the transmission pan. If it is completely square it is a 700r4, if it is square with one corner cut off at an angle it is a turbo 350, and if it is no where near square it is a turbo 400. Mike

01-28-2010, 07:20 PM	#3
CB24 Registered User Join Date: Jul 2009 Location: Surprise, AZ Posts: 138	Re: what auto tranny came in the 87 suburban? Its a 1/2 ton with a 305 v8. I'll crawl under it when I get home. Thanks for the response.

01-28-2010, 10:01 PM	#5
Mr.Chevy4x4 Registered User Join Date: Jul 2007 Location: Sims, NC Posts: 531	Re: what auto tranny came in the 87 suburban? I had an '87 with the TBI 305 and 700r4. It was a stripper with vinyl, but it did have overdrive. They did some crazy stuff back then. I have a '87 SWB 4x4 stepside that is a Silverado. It came from the factory with power windows and manual locks. Only one I've ever seen that way. I know it's factory since I've known the truck since new.

01-28-2010, 10:17 PM	#6
CB24 Registered User Join Date: Jul 2009 Location: Surprise, AZ Posts: 138	Re: what auto tranny came in the 87 suburban? Daggar, you made that too easy, hahaha. Its a 700r4 which is cool because I bought the truck for the front suspension for my 69' c10 & the gas tank. Now I can use the tranny too after a rebuild. Thanks for the help guys.

01-29-2010, 09:59 AM	#7
Jonboy Slots go on anything! Join Date: May 2003 Location: Richardson, TX Posts: 5,957	Re: what auto tranny came in the 87 suburban? Could you get a 305 in a Sub? I thought the 350 was standard. __________________ 1974 Jimmy- 5.3/4L80e/NP241

01-29-2010, 02:05 PM	#8
Daggar Registered User Join Date: May 2007 Location: Calgary, Alberta, Canada Posts: 42	Re: what auto tranny came in the 87 suburban? 305 was available until 1987. In 1988 the 350 became standard equipment. __________________ 1999 Chevrolet Suburban 2500 4x4 - 454, 4L80E and lots of other fun options 1967 Chevrolet C10 Longbox Stepside - Restored 1991 Chevrolet Suburban 2500 4x4 - 350, 4L80E - Not dead but severly crippled 1987 GMC Suburban 1500 - Now some retired guy's trailer hauler 1992 Lumina Z34 - I'll miss that PITA

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