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- Path: sparky!uunet!dziuxsolim.rutgers.edu!trident.usacs.rutgers.edu!jcborkow
- From: jcborkow@trident.usacs.rutgers.edu (Jason Borkowsky)
- Newsgroups: rec.autos.tech
- Subject: TH350 vs. TH400
- Message-ID: <Jan.22.12.43.11.1993.25844@trident.usacs.rutgers.edu>
- Date: 22 Jan 93 17:43:11 GMT
- Organization: Rutgers Univ., New Brunswick, N.J.
- Lines: 46
-
-
-
- I don't have much technical information to give you between
- the TH350 and the TH400. Just a bit of friendly opinions and
- advice.
-
- I recently got hold of a cheap, high mileage, blown head
- '69 Chevelle (350 engine, TH350 trans) to re-build 'for fun'. Since
- I had the time and a bit of money, I figured I'd do it right and
- make it into a higher performance car. I re-built the engine,
- increased the compression to 11:1, performance cam, etc. After I
- finished the engine, I then started on the transmission. I was
- going to get a new performance torque converter and rebuild the
- TH350, but I thought maybe the TH400 would be a better idea for
- the performance engine I now had. However, I ended up just rebuilding
- and keeping the TH350 for the following reasons:
-
- 1. The engine was a 350 and the transmission was a 350, and it sounded
- like such a nice, matched pair :)
-
- 2. The TH350 actually holds more fluid than the TH400. (The TH350 is
- about 23.5 quarts and the TH400 was a bit under that). Therefore,
- the TH350 can take more heat.
-
- 3. After looking at diagrams of both, the 350 looked a lot easier to
- work on than the 400.
-
- And the biggest reason I stuck with the 350 is this:
-
- When I was looking for a tranmission kit, I came across only one
- for the 400, which was just a simple, standard rebuild kit. I found,
- however, 4 or 5 for the 350, with different strength (and price)
- ratings. There was the simple standard one, a heavy duty (trailer
- pulling) one, a high performance one, and a very high performance one.
- Differences in the kits were the material the sprags wer made out of
- (don't wear as much and can take the heat better), cluth pad
- thickness, bearing tolerances, and bushing strength. I ended up
- getting the high performance one because it was only $60 more and I
- didn't like the sound of standard and heavy-duty. As of yet, no
- problems with the transmission. (Also, most torque converters are
- also made specifically for the TH350, with just a few (with adapter
- kits) for the TH400)). I know there's also a TH700 transmission,
- but I haven't seen anything on it, though.
-
- Jason
-
-