turbo 400 transmission not shifting
Not real bad and not noticeable at speed. So when you have a gear shifting issues, one of the things to check is your transmission fluid. Product Description. It shifts from 1st to 2nd fine. I can't get it to run in Drive. I have a Turbo 400 trans in my 68 Camaro. Also has a hard shift, usually from 1st to 2nd. It was like that when I bought it. All of the magic happens in the fluid. Get the best deals for 400 turbo transmission at eBay.com. ... Just shifting the lever into 2nd doesn't do anything. BangShift Tech: How to Repair the Kickdown Switch in a Turbo 400 Transmission. Transmission help Needed, th400 not shifting. They are broken into main gears and planetary gears. 2nd to 3rd is pretty smooth. Recently my transmission will not shift out of 2nd until about 40 mph. In drive you have to really get the RPM's up before it … A TH400 has no TV cable (shift cable). Just as it would at full throttle. Identifying Turbo 400 By the Tag. One day I will swap it for a 2004R but until then the 400 … It does have a solenoid on the left side of the transmission that usually goes to a microswitch on the carburetor that activates the down shift when the throttle is almost wide open. any ideas what could cause that? In this vid the process of removing the spring from under the front accumulator piston is demonstrated. Nearly every automatic transmission has some kind of kick down apparatus and they are all different. As you just learned, the vacuum modulator is what allows the transmission to shift properly. The Turbo 350 automatic found its way into Chevrolet Camaros, Pontiac Firebirds and Chewy and GMC trucks. ... to mess with the governor likley. Heavy Duty: Use for towing, off-road vehicles, campers, motor homes/RVs, trailers, and any other vehicle that does a lot of stopping and going (taxis, law enforcement). You have to check if the fluid is enough to lubricate the transmission properly or not. When the truck is parked I push the button on top of the Lockar shifter and it goes into Reverse just fine. It HAS VACUUM TO THE MODULATOR. The trans thought it was in passing gear all the time. I am able to shift manually into 2nd and 1st with no problems. This was one of General Motors editions of the Hydramatic transmission series. Share this conversation. It has the small modulator so you can adjust but I can't turn it any more. I had a short shaft Turbo 400 rebuilt out of a 1978 Chevy Diesel Pick Up with the Oldsmobile diesel, code CK78. This transmission is known more commonly by the name TH400 , although it did receive another name change in the late 80s , adopting the name 3L80. This modification yields a firmer second to third shift. Show More. Ask Your Own Chevy Question. Turbo 350 shift problem I removed all components from inside of the accumulator cap. He says it was running ok just afterwards but two days later it is now exhibiting shift problems. I have a 1988 Chevy 2wd truck with a fresh built tubo 400 transmission. An automatic transmission is designed to upshift automatically at a preprogrammed engine speed. We have a great online selection at the lowest prices with Fast & Free shipping on many items! It is machined into the transmission in most cases. The TH400’s high-level of adoption could be tied to its remarkable features, and it proved that people can once again rely on GM transmissions. 1965-UP GM TH400 Transmissions. ... my 1990 c1500 pick up has a 3 speed turbo 400 and wont shift out of 2nd gear its a fresh rebuild. Dirty or Low Transmission Fluid; When car transmission Fluid is low or dirty is could lead to transmission shifting hard from 1st to 2 nd and even from 2nd to 3 rd. This involves a process of elimination, usually starting from the simple, easy-to-check items, then moving on to more difficult items in logical sequence. I had a simular problem with my 400, it would not upshift till very high RPM, turned out being the kick down solenoid, it leaked. Fairbanks Turbo 400 TransAction Shift Kit. Offers 4-Levels of Performance. ... or re-work the governor for automoatic upshifts at 5000rpm (so I can race in "Drive"), and not worry about the transmission downshifting on its own during corner exit. SOURCE: I have a 1966 Ford Falcon with a C4 transmission. It will shift out if 1st around 15-20 mph. Answered in 12 minutes by: 1/30/2009. No matter how hard I get on it, it would not shift until that speed. my turbo 400 wont shift into 3rd? Home > Construction Training Manuals > Construction Mechanic Advanced > Table 7-2.-Turbo Hydra-Matic Model 400 Troubleshooting List Previous Page Next Page Table 7-2.-Turbo Hydra-Matic Model 400 Troubleshooting List The trouble I am having is that it is shifting way to soon. Discussion in 'The Hokey Ass Message Board' started by Scallop, Jun 16, 2008. This popular transmission was found in GM’s cars, as well as, Rolls-Royces, Jeeps, Jaguars, Ferraris, etc. 1,290 Posts . Discussion Starter • #1 • Jul 14, 2007. Ok. Have a chevy truck, the engine runs great. Fluid: Transmission fluid is very important to an automatic transmission. A very interesting automatic transmission to consider, when replacing that tired old transmission or even upgrading an older unit like the Powerglide, is the Turbo Hydra-Matic 400. It is a Turbo 400 body, with a longer Turbo 350 output shaft. Re: Turbo 400 Transmission not shifting 07-08-05 11:36 AM - Post# 735692 In response to gchemist The governor cover is on the side of the transmission, just ahead of the tailshaft housing, it's a round cover, that presses into the tranny case, pry it out, the governor assembly is inside, it will pull out and you should see the broken gear on the end of the shaft. GM 400 TH Transmission will not shift out of 1st gear, but will reverse. I would begin by replacing the filter if its not new, 2 possibility of issue, faulty shifting module or defective transmission rebuilt. Re: TH350 Transmission problems with shifting by rogal_tx Wed Aug 17, 2011 8:42 am Surprisingly enough vacuum line modulator was a problem to shifting, replaced it and shifts good,(so no manual valve body) but I'm still fighting the leak. it shifts from first to second ok but then it doesnt seem to shift into third and if it does it kicks back to second? I am have a turbo 400 in my 57 pickup and I just got it running and driving but when I am driving the truck it will only run in 1st or 2nd. I have a turbo 400 with no reverse, when shifting from park to reverse you can feel a little something but no matter how much throttle you give it, it never moves an inch. Aug 17, 2011 Brian Lohnes BangShift News 1. The fact that it is not electrically actuated by solenoids means it requires other apparatus to regulate shift points. How to Rebuild Your GM Turbo 400 Transmission: Tools and Equipment Completely and correctly rebuilding an automatic transmission is not beyond the capabilities of the average automotive enthusiast. It used to shift from 2nd to 3rd gear at about 40-45 mph. 4) Shifting Problems If you’re experiencing all of the above symptoms while having shifting problems too, then you likely have a faulty transmission vacuum modulator. Gears: Even though you're not shifting them, an automatic transmission has gears. GM Turbo 350 Transmission Rebuild Troubleshooting Guide Troubleshooting is the step-by step process where you can logically diagnose a problem. The full-throttle shifts from the Turbo 400 in our '72 Firebird have always occurred at … 1978 1/2 ton 2wd with a 350v8 and 350 transmission. The TH400 is an early model, non-computer-operated transmission widely sought after by car enthusiasts for its internal strength. I was having late/hard shifting with my Turbo 400 trans, was told by a mechanic to put a new vacuum pump in, I installed a new vac pump (gear driven) it produces good vacuum to the IP (21 Hg in & 8 Hg out) I also checked at the trans modulator - also 8 Hg, but the truck shifts just as late and as hard as it did before I put the new pump in. going by my VIN number I have a turbo 400 transmission without overdrive in it. The TH400 or Turbo 400 is a good transmission that was used in several cars years ago. As automatics go, it is considered the heavy-duty version of the Turbo Hydra-Matic 350; they are … ... My Suburban 1999 will not go in reverse and has problems shifting from 1st to 2nd. Show Less. Accelerating up through 35 MPH and past 45 MPH still does not produce that 2nd shift. I am truly hoping that it is just the governor. 1971 Malibu, factory buckets/full gauges/console, 377 roller cammed small block, Turbo 400, 3.42 10 bolt posi (Buick), - All your base are belong to us. I just took it back apart on Tues. and took the extension out of the hole and it did seem to make a very very slight difference, but still no where near where the tranny should be at; not only that but no where near a stock shift either. the pan … OK, on item #1. My recently rebuilt TH350 doesn't seem to be shifting into the 3rd gear automatically. The modulator is on the rear. Can too much transmission fluid cause sluggish shifting, slippage, and delayed reverse engagement when hot? The Turbo 400 transmission was a 3 speed automatic transmission developed by General Motors. just because it has been rebuilt does not mean the individual work on it did a good job. You need all of these to be able to drive. So, it’s really not really a tag, which can make it a bit more difficult to identify if the transmission is really greasy. It shifts fine into the 2nd gear but not 3rd. You’ll find the identification tag above the transmission pan on the drivers side. Drive, 2 and 1 all work normal and it will change gears when driving on the road as well. Ah. Although the transmission most notably matched GM vehicles with small-block V-8s, it also matched the block-block 396 V-8s, V-6s and the small Iron Duke in-line four-cylinder models. Update: It's also leaking pretty good. If I'm running about 35 and it's not shifting I can manually put it into 2nd and back into drive and then it will shift into 3rd and 35 mph but other than that it requires being around 40mph for it do to it change gears by itself. Turbo 400 will do a 1-2-3 shift with it disconnected. Last week my son loaded about 2000 lbs into it and drove ten miles. Mine whines. But there is something about it that keeps away even the most skilled automotive technicians. Am having is that it is shifting way to soon at about 40-45 mph on the drivers side a. Is what allows the transmission to shift properly last week my son loaded about 2000 lbs into and. 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