Turbo 200r 4 identification

[xs-cash]

I’m looking at a 200R4 tranny , it has a ID tag that says HC F , any idea what type of car it came out of ? I tried to search , but no luck.

[hugger6933]

Duh, early to mid 80's GM. Sorry No help I coudn't resist. Good luck. Jim

[gmc684x4]

S10 had them not sure about hcf

[Sheepdip]

This may help you:


http://web.archive.org/web/200701281.../thm2004r.html

[hugger6933]

S-10's Never came with them, and never is a dangerous word. The S-trucks had 700R4, or in the first two [ I think model runs] TH125C [three speed]. I have had at least one of every year model S truck That used to be my thing along with the full sized Chevy trucks from then but I always said the S trucks were my bread and butter. This thread makes me sound jerkish and that isnt me, or at least I dont think it is.

[hugger6933]

Monte Carlo SS is the best to find but that is plenty rare. The 200R came in Regals And most all G body cars and intermediates from the General. There are even some dual pattern meaning they will work on just about anything GM

[old51sedan]

Originally Posted by xs-cash

I’m looking at a 200R4 tranny , it has a ID tag that says HC F , any idea what type of car it came out of ? I tried to search , but no luck.

From what I understand is they are made to fit most GM products including chevy, Pontiac, Oldsmobile, Buick, etc. The one I just installed in my truck came out of a 86 full size chevy wagon. The ones that were installed in the 442's, Monte Carlo SS, GTO, etc. were the same as regular cars, but have a beefed up valve body which could be installed in any of the 200-4R's. They are getting a little had to come by, especially the muscle car ones. Unless your going to beat the hell out of it, it shouldn't make any difference.

[Sheepdip]

Yes they have been hard to find for a while, I searched craigslist religiously for about a year before I found one. Have not installed it, just stashed for now, plan is to put it in my 40 Ford Coupe eventually.

[SCOTI]

They are the popular g-body platform OD trans as mentioned. Strength wise (stock) they're similar to a 700r4. Their benefit is in the gearing. The 1<2 gear split is closer to a TH350/TH400 vs. the 700r. OD is a little more aggressive as well (.67 vs. .70).

The MCSS, Olds H/O's, & GN/T-Type Buicks did have a specific valve body & stamping to make them easier to spot but I don't recall what it was & doesn't make much difference if you're upgrading for an aftermarket/different drivetrain. Easy to spot them though as the pan is long & has 16 or 17 bolts (I don't recall which it was).

[xs-cash]

Plan on putting it in my 72 1/2 to ,stock 350 with 3:08 rear

[SCOTI]

Originally Posted by xs-cash

Plan on putting it in my 72 1/2 to ,stock 350 with 3:08 rear

That's going to be super tall gearing for OD speeds. What tire size are you planning for on the rear axle?

[xs-cash]

235/75 /15 tires , totally stock truck

[SCOTI]

Originally Posted by xs-cash

235/75 /15 tires , totally stock truck

Thats 1685rpm @ 65mph & 1800 @ 75mph.
A 60's-80's sbc in a C10 is going to need 22-2400rpm for the 'sweet' spot.

3.73's would yield about 2200rpm @ 75mph.

[xs-cash]

Originally Posted by SCOTI

Thats 1685rpm @ 65mph & 1800 @ 75mph.
A 60's-80's sbc in a C10 is going to need 22-2400rpm for the 'sweet' spot.

3.73's would yield about 2200rpm @ 75mph.

I just want to be able to drive it on the highway and not be screaming rpms

[SCOTI]

Originally Posted by xs-cash

I just want to be able to drive it on the highway and not be screaming rpms

With that auto trans/gearing & tire height, you'll need more rear gear.

People assume that 1600rpms = better for driving but sbc's/bbc's have a happy spot slightly above 2krpm. That needs to be the target. Even the later LS/automatic combos are set-up to achieve over 2krpm @ highway cruise speeds (manual trans cars are geared differently).