They are completely different transmissions. The Turbo 400 is larger, longer, and heavier than the Turbo 350 and was designed to live behind higher-torque applications such as big-blocks. That doesn’t mean the Turbo 350 is weak in comparison.
How much HP can a TH350 handle?
The Stage 1 TH350 is rated up to 450 hp. Those seeking something a little stronger can check out the Stage 2 version (PN PA35102) that holds 550 hp and retails for $1,500 with a real world street price of $1,175 from most vendors.
Is a Turbo 350 and a Turbo 400 the same length?
The overall length of the TH-400 is 38 inches, while the overall length of the TH-350 is 33 5/8 inches, if both use the longest tail shafts available. The TH-400’s body is 25 inches and the TH-350’s body is 21 5/8 inches long.
Is the Turbo 400 a good transmission?
The Bottom Line
An overview of the TH400 transmission shows it is a durable transmission that can give a good performance. The TH400 was used in a wide range of cars from GM as well as other manufacturers. Interestingly, the transmission can be adapted for use in several engines today.
What transmission can replace a TH350?
TH200-R4 is the other common retrofit option for a TH350. Pluses and minuses to both conversions, probably about the same $$. I went with up-rated 200-R4 to replace TH400 because it was a straight bolt in.
Are TH350 transmission any good?
The TH350 is an automatic shift, three-speed transmission. It is widely considered to be one of the greatest of automatic transmissions ever built. … The Turbo 350 is the shortest and one of the strongest automatics that can be put into a Jeep.
Will a TH350 bolt to a big block?
Just make sure the converter you use has the large bolt pattern on the mounting tabs, or a dual bolt pattern. The Big-Block flywheel will have a large bolt pattern. Outside of that, it will bolt right up.
Is a Turbo 400 transmission a 4 speed?
The Turbo 400 transmission was a 3 speed automatic transmission developed by General Motors. … Overall the transmission remained in production an impressive 27 years before it was eventually replaced by a 4 speed electronically controlled transmission, the 4L80E, in 1991.
How can I tell if I have a 400 Turbo transmission?
Look at the driver’s side of the transmission. The Turbo 350 has a “kickdown” cable attached to the right side attached to a manual linkage on the transmission. The Turbo 400 has an electrical switch.
How much longer is 4L80E than TH400?
4L80E transmissions have nearly 25% overdrive and are 4 inches longer than the TH400. The trans mount has been moved rearward by an inch-and-a-half. If we talk about the weight, the 4L80E is nearly 50 pounds heavier compared to the TH400 due to the electronic control.
Is TH400 and Turbo 400 the same?
They are, for the most part, interchangeable on the same vehicles; however, you would normally find the TH400 in larger engine applications because they are able to function more reliably at higher engine rpms.
How many gears are in a Turbo 400?
TH-400 transmissions are three-speed automatics, with a 2.48:1 first gear. Reverse gear is 2.08:1 and third gear is an even 1 to 1. Turbo 400s use three tail shaft lengths; the most preferred units for a GM swap would have the short 4-inch tail shaft.
How fast can a TH400 go?
Registered. you can go much faster than 55 depending on gear ration and tire size. The th400 is not an overdrive, but the 6.2L can spin pretty fast. The tranny should have nothing to do with it.
Are all TH350 transmissions the same?
Externally, all the TH350 transmissions look the same; however, internally there are some differences. Depending on the engine size of the car the transmission was removed from, it can have anywhere from 10 to 18 friction discs and 10 to 18 steel clutch plates inside.
Is a TH350 the same length as a 700R4?
Length And Weight
The TH350’s case length is 21 5/8 inches. Depending on the tail shaft housing, its overall length can either be 27 5/8 or 30 5/8 inches. The 700R4’s case length is 23 3/8 inches and its overall length is 30 3/8 inches. The TH350 weighs 120 lbs., while the 700R4 weighs 155 lbs.
How many gears does a Turbo 350 transmission have?
Turbo 350 Performance Specs
This is an automatic transmission that is longitudinally mounted, making it applicable for rear-wheel drive cars. This transmission is a 3 speed, and no overdrive gear was available. The gear ratios used for this transmission were 2.52 for 1st gear, 1.52 for 2nd gear, and 1.0 for 3rd gear.