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Hydramatic similar to those from RR/B from 1952), until 1992, have the 3L80. Rolls-Royce SZ (Silver Spirit and derivative) cars from 1992 have the 4L80E. Holden in
Australia fitted the 3L80 to tens of thousands of the larger V8 cars too, and Aston Martin was another. In the global Rolls-Royce and Bentley community, the Hydramatic, the THM400 - 3L80 and the 4L80E are very well known indeed. The Hydramatics and sucessors are a phenomenal success in those cars, with motors ranging from 6-cylinders ones of 4556cc to tubocharged 6750cc V8 variants.
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551:"C" variant with the lockup converter, but still a THM250 and the 305 V8 is larger than a straight six. The transmission was rather weak and it failed around 1987, then again (when I bought the car) around 1990 and for the last time in 1994 (when I had it upgraded by a local shop). I've still got it (parked behind my main barn), complete with the TH250C.
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The statement "Usually the THM250 was coupled to smaller displacement engines - the largest a third generation
Chevrolet inline six found in the Nova and Camaro (1974 and 75 model year only)." is incorrect. I own a 1984 Pontiac Grand Prix that came stock with a 305 V8 (5.0 l) and a THM250C. It is the
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I'm asking because by 1990 many of their automatics still used the older nomenclature until being phased out in favor of newer models, such as the 700-R4/4L60 being replaced by the 4L60E (and later the 4L65E) and the 400C/3L80 being replaced by the 4L80E. If GM did introduce the naming scheme for the
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It was written that the TH400 was renamed the 3L80, with the designation meaning 3 speed
Longitudal, and a "Arbitrary" strength reating of 80, yet other Knowledge articles seem to indicated that the 80 is short for 8,000lbs GVW, just as the 60 in 4L60 indicates 6,000 GVW; the maximum vehicle weight
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How about a bit more on the 4L80E, simply a THM400 with an overdrive and electronic control as fitted to Rolls-Royce and
Bentley cars from 1992Â ? From 1965 until 1992, all Rolls-Royce and Bentley cars (apart from RHD cars until 1968 and most Phantom VI cars, which are fitted with the 4-speed
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ok, now to my point, i have a 1987, yes, 1987 R10(C10) shortbed, code 90 gray paint, custom deluxe, tbi 4.3L vortec V6 with a th350 trans, this article states that its last use was in 86, but since my 87 came factory basic with one, this cant be true....
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If the strength rating being a gross vehicle weight in pounds is a referenced fact in other articles, then the same references can be used in this article. What other articles is it in? I suspect, however, that it should be GCW rather than GVW.
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it has to do with engine torque, not gcw, or gvw....i have a 92 extended cab stepside with a 350 and a 4L60(700r4) and an 86 1/2 ton suburban with a 350 and 4L60 trans(700r4) both have gvw's exceeding 6,000 lbs, and gcw's exceeding 12,000lbs
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Isn't that the trans used in HD trucks now? Haven't found anything on wikipedia about it. Not regular trucks, but 2500hd and 3500hd with autotrans that don't have the alison. (typically with 6.0L or 8.1L)
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above, you have a point, the fwd transmissions are turbo hydromatic, my 95 Pontiac
Bonneville has a 4T60E transmission, and on the bottom of the pan it says "turbo-hydromatic; division of GMC.
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above, yes, torque converters do fail, rarely, but they do, also , you could have an unnoticeable failure, such as a bad servo for first gear, and if first doesnt work, none do
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This information about GM's changing the nomenclature for 1987 seems conflicting because the previous nomenclatures for most of these models persisted as late as 1990.
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This article's a good start, but it definitely needs to have additions made for the FWD transmissions, since they also fall under the Turbo_Hydramatic nomeclature. --
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For a reference link that confirms the TH250C was used in the 1984 Grand Prix behind a 305 V8, I found the following GM parts catalog that shows the combination:
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https://www.rockauto.com/en/catalog/pontiac,1984,grand+prix,5.0l+305cid+v8,1255182,transmission-automatic,governor+cover,23075
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The statement in question is referring to the original THM250, not the later THM250C that was introduced in 1979. --
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to see that there is already an enormous amount of
Hydramatic, THM400 - 3L80 information online and it is growing.
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Did GM actually introduce their automatic transmission model nomenclature revision in 1990 instead of 1987?
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For starters, check the second reference for this section which I only made it about 1/3 the way through.
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1987 model year, then surely all their transmissions would've had the revised nomenclature, correct?
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on
Knowledge. If you would like to participate, please visit the project page, where you can join
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Knowledge. If you would like to participate, please visit the project page, where you can join
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There are many more vehicles needing to be added to this list. I got tired of editing it...
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Don't forget the four wheel drive and all wheel drive ones. Here's some of the FWD models.
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above, all th400, thm400, and 3L80 are correct for turbo hydromatic 400 transmission
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