1975 monza

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1975 monza

Postby mirage_brat » Sat Feb 21, 2015 12:01 pm

what kind of automatic transmissions were in 1975 monzas with the 4.3l engine?
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Re: 1975 monza

Postby cjbiagi » Sun Feb 22, 2015 4:41 pm

I believe they had a Turbo 350
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1975 Chevrolet Monza

Re: 1975 monza

Postby mirage_brat » Tue Feb 24, 2015 2:48 am

i wasnt sure if they had a metric transmission or a turbo 350 but im pretty sure its a turbo 350. :th:
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Re: 1975 monza

Postby cammerjeff » Mon Mar 02, 2015 5:24 pm

I am pretty sure all the V-8 automatics were T-350's from the factory, but in the last 35+ years you never know what a previous owner has done. It is easy to spot a Metric 200 as it will have "METRIC" stamped into the pan. But here is a link to a site that has all the different was to tell GM Automatics apart.

http://www.maliburacing.com/auto_tranny_id.htm
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Re: 1975 monza

Postby Monza Harry » Tue Mar 03, 2015 11:52 pm

You may have a THM 250 as well. It looks the same as the THM350 but it has less plates and discs in each clutch pack. I believe the "General" tried to tell us it was for lower parasitic loses, (as you see that 262ci. of fury just didn't need 350ft/lbs of torque capacity) but I am sure the all mighty DOLLAR was the real reason. My '76 GM repair manual lists this tranny as a possibility, but with the lead time for publication/production the two (car and book) don't all ways match up. Harry
Last edited by Monza Harry on Mon Jan 18, 2016 8:47 pm, edited 1 time in total.
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Re: 1975 monza

Postby MonzaRacer » Sun Jan 17, 2016 9:14 pm

The difference between the th250 and 350 is 100 ft lba torque capacity and the fact the th250 needs periodic band adjustments, the nut and adjuster are on the side of the trans. While they operate similar the 250 is a weak kitten for hopped up mills.
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