12/5/2023 0 Comments Chevy 400 transmission![]() The TH350 is a 3-speed transmission with a higher 1st gear ratio (2.52:1) and a provisional 2nd gear, facilitating enhanced initial momentum for drag racing and everyday driving. GM’s Buick and Chevrolet divisions designed the THM350 primarily for its Chevrolet trucks and cars (1969-1986), having small-block engines. The GMC Turbo Hydra-Matic 350, famous as “Turbo 350,” first appeared in 1969 to replace the GM’s two-speed Powerglide transmission. GM TH350 (or ‘Turbo 350’) The TH350 is a 3-speed transmission with a higher 1st gear ratio (2.52:1) and a provisional 2nd gear, facilitating enhanced initial momentum for drag racing and everyday driving. This article will compare and contrast four distinct GMC transmissions-TH350, TH400, 4L60E, and 700R4 based on standard performance specs. ![]() Though automatic transmission technology has hugely evolved since it was introduced about eighty years ago, the core design remains nearly the same. GMC pioneered the basic technology involving automatic transmission by embedding the original Hydramatic or Hydra-Matic transmission in the Oldsmobile launched in 1940. 5 1/2 qts.General Motors Company set the ball rolling for modern-day automatic transmission for its automotive gasoline engines by introducing the 1940 Oldsmobile. How much fluid did your t400 take to make it full per your dipstick ? Then they would simply have to scribe or punch two marks on their cut stick to indicate full and add a quart at the proper location on the stick.Īs the thread was posted as how much fluid in a rebuilt 400. One could cut the top of their tube off until they liked the look, then they could simply cut the bottom off at the appropriate length. I would honestly trust this set-up more than I would have trusted someone giving me a new stick and saying "trust me". That amount of fluid in a pan could be varied by the gasket material (cork vs. So an 1/8" on a stick is pretty dang close in my opinion. We are talking about a transmission that has a variance (on this stick anyways) of more than 3/4" between add and full. I could be off 1/8" low (stick too long), but I can guarantee it wouldn't be more than that. I filed the top so it didn't look some rat chewed the tube, cleaned it up with some brake cleaner and mounted it up. My first cut was lucky and I only had to file the top of the tube straight (sawzall cut)īasic caliper measurement up the tube from the bottom until I hit the stick, added the distance from the bottom of the stick to the "full" mark, cut away. The stick is already marked "add a quart" and "full", so the cut and filing was done until the full mark reached the depth of the top of the pan. What was the process you used to ensure the CORRECT amount of fluid was added to the T400 and it was at the CORRECT LEVEL ? How did you come to cutting 6 5/8 off the tube ?įrom my reading, the "full" mark on the stick should be at the pan/transmission joint (basically at the gasket). After a fruitless search of the local parts stores and transmissions shops, I ended up cutting 6 5/8" off the tube so that the stick was in the proper position (really cleans up the engine compartment with the dip stick neatly tucked behind the valve cover).ĥ 1/2 quarts to fill after dropping the pan, filter and gasket replacement. The PO and or the builder of the th400 put the wrong stick in the tube. Long story short? After dropping the pan, I noted that there wasn't any dip stick protruding into the pan. Of which, I pumped probably a quart out the over-flow tube and onto my shop floor (ignorant error on my part). I put three and a half quarts in and NEVER got a drop on my dip stick. Here's where the first of many alarm bells started going off with this truck. Now mind you, this was not just a dripping leak, this was a steady flow of drips. So after changing the rear seal I went to top off what I had lost after driving it home. New to me truck (78), super info from the PO (not) and a leaking out-put seal (rear seal). Not to make my initial post here a non-informative, but I just dealt with a th400 oil pan drop and refill.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |