The TH400 was launched by General Motors in 1964, as a replacement to the ST300 2-speed automatic transmission. It was used in a wide range of vehicles, hence, it was not just exclusive to GM cars. … Around the same time when the TH400’s name was changed, an overdrive version called the 4L80-E was launched.
Is a 700R4 better than a TH400?
For a daily driver on the highway a 700R4, for a mudder truck definitely the TH400. For any rig it’s going to depend on the purpose. The TH400 is much stronger, but it doesn’t have overdrive and the first gear is only 2.48:1. The 700R4 has an overdrive gear (0.7:1), and a 3.06:1 first gear, but it’s not as strong.
What is a Turbo 400 transmission worth?
selling it as a good unit and with a “it will work” or your money back warrantee, it should be worth $150-200. There are many shops that sell a stock rebuilt TH400 for $600.
What transmissions have overdrive?
In the case of manual transmissions, overdrive is the highest gear of the transmission but has to be engaged by the driver. In a five-speed transmission, overdrive is the fifth gear; in a six-speed transmission, overdrive is the sixth gear; and so on.
Is a TH400 better than a TH350?
The TH350 uses a mechanical kick down switch, whereas the TH400 uses an electric one. … A lot of people claim that he TH350 has less drivetrain loss than the TH400, which means that all things being equal, the TH350 is going to get more power to the rear wheels from an engine with equal power.
How much horsepower can a Turbo 400 transmission handle?
About 400-450 HP/TQ is the limit on the stock TH400. With ONE almost free modification and some minor valve body calibration changes, 800 HP on an otherwise stock TH400 is not a problem if it’s assembled well (good endplay, etc), and the 34 element sprag is a wise addition above 450 HP or any drag usage.
Can you swap a 700R4 with a TH400?
Yes there are aftermarkets for both but stock, they’re the same and rated for the same input torque. If I was going to have a crappy TH 350 I’d much rather have a 700R4 which has a better 1st gear, and overdrive to boot.
Is a Turbo 400 the same length as a 700R4?
Registered. edit: okay, AA sez the 350 is 21.5″, 700r is 23.375″, 4l60e is 21.875″, and 400 is 24.25″.
How much HP can a 700R4 handle?
The Street/Strip 700R4 is good for about 550 hp maximum, but with the HD input drum it is good for about 625 hp max. Add another $240.00 for the input drum.
Is a TH400 a good transmission?
The TH400 is an automatic shift, three-speed, longitudinally positioned transmission. It is widely regarded to be a supremely durable and legendary transmission. The TH400 is conservatively rated at 450 ft. lbs.
How much oil does a Turbo 400 transmission take?
You can expect to use between 11 and 12 quarts of fluid in the stock version.