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While it does give a nice crisp 1-2 shift it is really a convenience thing for me. Most of my customers are soccer moms/daily driver tahoes, burbs, ect… To most of them a hard shift means something is wrong and usually meaning valve body issue caused by epc either over compensating or maxing out line pressure and banging hard shifts. Now me I love a hard tire chirping shift. My daily driver right now is a 2000 chevy s-10 Ls. I found a tranny and 5.3 w/computer out of a 01′ silverado and this beast when I am done it gonna get sideways. It will have the vette servo and shift kit.. For me alot of upgrades are a convenience thing and most customers want it to shift like it did when they got it.
Thx for the info and I do appreciate it. I am not a exact expert in the 700/4l60 but I have built about 30 or so of the units in the last cpl of years. I did know about these upgrades and have used them all. Me personally I am not a fan of the Vette servo but alot of guys want it in there and gotta do what the customer wants but if you do change the captured check ball in the servo bore first it will leak if you dont. I build all my units as a 4L65. I upgrade to the pin less accumulators they are only about 25 bucks or so and I’ve found it usually leaks around the pin anyhow so why not kill 2 birds at once. I personally think Sonnax makes a better P1870 fix than Transgo for sure but the reamer is expensive instead of the over sized spring but thats my opinion, also I’ve found if your gonna change the boost valve you have to look at the PR valve spring (I always change em anyway) and upgrade the epc solenoid.
PS screw the 13 vane rotor stick with the 10 way less chance for cavitation when it gets hot. and it will get hot.
I originally posted this in this section because this is the section for it being known pattern failure. But I am always down to see what others do with their units be it chev, ford or dodge . I have a 79 Th-400 in the garage I’m gonna build got it for a steal 50$ from a guy at the crusher here in Tucson. Full mods but most around here use these for towing so cant go all out with a manual valve body or trans brake it.actually there are all kinds of differences in the valve bodys from year to year Now the valve line up may have been the same and even some of them were changed the major differences are usually the worm tracking itself, and were updated yearly from info from tranny shops as to their flaws. in 96 the manual valve itself changed and will not retrofit back. I dont know who this Hollander is but I can tell you from past experience learned the hard way that you cant use a 95 valve body on a 94 case or vice a versa it has to be year to year basically what i am saying is the 95 case has to use a 95 VB and a 95 spacer plate or it will have problems big ones. same with spacer plates they changed too from year to year due to models be it camaro, p/u,corvette, eg….. (i’m using 95 as an example) due to the differences in the case and VB worm tracking all the way up to 01′. Yes they have a huge problem with stripped and broken sun shells but being the most massed produced transmission ever made I would say it is pretty good over all. Like all man made objects, flaws and weaknesses can and will be found. So whats your take on the ford 4r70w?
i’ll check the tap point on my next hook up, I don’t have a release valve like some of the fuel pressure gauges have I wish they would I’m thinking about getting liquid filled gauges.
Cool me personally I’ve never had any issues with the plugs on the MLPS sensor. but if I do i shall give it a whirl and like you I never put the load springs back in either even though after 01 they are supposed to in there, I have seen 3/4 binding issue related to the springs being in there. Over all though the 4l60 is a good tranny. I like the 4l80 more though. What interchange are you referring to saying 96-02? Are you talking about the TCC PWM that was in 95 any car truck or van after 6/95 had the new style pump and solenoid for the lock up converter. Or the removable bell housing that was a 96′ thing.
True except on the 2001 and newer model drums. GM redesigned them totally and actually requre the load springs you are referring too. I did not know that the fusion line was using TH trannys in some cars. I have a friend with a fusion Im for sure gonna look at it thx for the heads up.