Do you regret going to TH400?
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i have been using 350s and 400's for 40 years, wouldnt give up my 4l80e now, lol
4l80e core, $150 (2004 unit)
parts, $350 (rebuilt myself)
converter, $725
Compushift controller, w/display, ebay deal, $980
def not as cheap as a 400, computer is big cost, but you can make a 4l80e man shift, i did it but wasnt happy with it
then again, build the 400 and have enough left over to buy a trailer
TH400: No OD (adding a gear vendors will cost just as much as a 4L80e, and you still won't have lockup)
4L80E: can be just as strong as a TH400
4L80E: only a few inches longer than a TH400
4L80E: converters available with over 4000 stall speed & lockup
4L80E: lockup converters available that can lock under full throttle
4L80E: nice O.D. that can take full throttle.
I have had TH350's, 400's, 700r4, & now a 4L80E. I liked the 700R4 the best, it was light, cheap, and held up in a mid 11's 1980 malibu with a cheap 468 bbc. I built it myself, the car had a cheap 3500 converter & 4.88's with 295/50-15's on the street. I drove it to work every day (25 miles each way).
I bet you can have a 60e built that you can't easily break, and it has a lower 1st gear than the 400 or 4l80e
Go drive a 3.70 gear car with 26-27" tall tires down the interstate for about 100 miles in 1:1






