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Ecklers AutoMotive
Username Post: TH350/TH250 Trans identification        (Topic#76234)
nova2666 
Member
Posts: 14
nova2666
Reg: 09-25-04
09-25-04 05:16 PM - Post#518343    

Just wondering if someone knows how to identify if a trans is a 250 without droping it. Looks like I got screwed when I bought this truck. The tranny shop told me it was a 250 but I forgot to ask them how to identify it.

'66 Nova 6 cyl '70 GMC 3/4 ton "Sierra Grande" '72 Monte Carlo


 
Ecklers AutoMotive
Anonymous 

Re: TH350/TH250 Trans identification
09-26-04 12:53 AM - Post#518344    
    In response to nova2666

you can tell by looking at the pan.





 
nova2666 
Member
Posts: 14
nova2666
Reg: 09-25-04
Re: TH350/TH250 Trans identification
09-27-04 05:37 PM - Post#518345    
    In response to TugOwar

The problem is that the pans on the 250 and 350 are the same. The 200 is a diff. pan. Maybe the numbers or something else is different.

Thanks,
Jennifer

'66 Nova 6 cyl '70 GMC 3/4 ton "Sierra Grande" '72 Monte Carlo


 
Anonymous 

Re: TH350/TH250 Trans identification
09-27-04 06:02 PM - Post#518346    
    In response to nova2666

Have a look above the cooler line fittings.

If there is a threaded screw sticking out of the case with a jam nut on it, it's the band adjustment on a THM250.

If there's nothing up there, it's the THM350, or THM350c with a lockup converter.

(Oh, and there was a 200 Metric that shared a similar pan to the 250/350's, the 200 Metric had "Metric" stamped right into the pan. The one in the pic above is the 4 spd overdrive tranny - THM2004R.)



 
nova2666 
Member
Posts: 14
nova2666
Reg: 09-25-04
Re: TH350/TH250 Trans identification
10-03-04 05:39 PM - Post#518347    
    In response to 19_Chevelle_69

I don't see any screw sticking out above the tranny lines. Now I am confused. Maybe I will call the tranny shop and ask them why they thought it was a 250.

Jennifer

'66 Nova 6 cyl '70 GMC 3/4 ton "Sierra Grande" '72 Monte Carlo


 
mr wabbit 
Super Senior Member
Posts: 3535
mr wabbit
Loc: IL
Reg: 02-26-02
Re: TH350/TH250 Trans identification
09-16-05 10:46 AM - Post#518348    
    In response to nova2666

a 250 is identical to a 350 in EVERY single way except for that the 250 has pan with huge X stamped into it

250 has KICKdown cable and alpso has vac mod valve, all same as th350, and even same pan bolts- 13 of them

i have one of these 250C trannies in my 94 impala, behind the original 229 chevy engine, its a 90 degree v-6 3.8L rear wheel drive, same as in the camaros and such 79-84

its a sbc v8 chopped off just like a 200ci v6 and a 4.3L v6

gm made some oddball RWD engines in the late 70s and early 80s,. gas mileage years,

Randy
Lincoln Il
1982 Trans Am WS7
305 TH350 7.5" for now
http://smg.photobucket.com/albums/v298/fast68/ra nd...


 
Ecklers AutoMotive
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