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help with 904 band adjust !

Posted By: moparjimbo60

help with 904 band adjust ! - 03/20/11 03:10 PM

adjusted the bands on my 904 before going to the track yesterday. made 2 passes @6.74 and 6.75 next 2 passes were 6.80 and 6.79. the 6.80 was in the heat but the 79 was about 12 degrees cooler. but the shift from 1st to second seemed to overlap each other. second to third were fine . is the band to tight or too loose ?
Posted By: dartman366

Re: help with 904 band adjust ! - 03/20/11 03:19 PM

did it do it before the adjustment? if not then just back it off 1/8 to a 1/4 turn and see if it goes away, usually it is a 2-3 shift overlap/flare up problem, how is your tranny built? stock, rebuilt with good part's?
Posted By: moparjimbo60

Re: help with 904 band adjust ! - 03/20/11 03:22 PM

yes it a rebuild with good clutches and steels, did not do it before. so its too tight ?
Posted By: DavidDean

Re: help with 904 band adjust ! - 03/20/11 03:23 PM

I adjust my front band 72" lbs & 2 1/2 turns out, my double wrap rear is 72"lbs & 4 turns out.What are your bands adjusted to?
Posted By: moparjimbo60

Re: help with 904 band adjust ! - 03/20/11 03:25 PM

i dont have an inch # wrench ,just always snug up then back off 2 and ahalf. but snug is a relative term.
Posted By: dOoC

Re: help with 904 band adjust ! - 03/20/11 03:45 PM

Quote:

i dont have an inch # wrench ,just always snug up then back off 2 and ahalf. but snug is a relative term.




"snug" ? ... .... I have just done-it with a little-bitty open-end wrench USING the tip-O-my-finger
Posted By: moparjimbo60

Re: help with 904 band adjust ! - 03/20/11 04:07 PM

yep thats what im talking about, but i could have got carried away
Posted By: Dodgem

Re: help with 904 band adjust ! - 03/20/11 05:42 PM

My experience it does that when the band is too loose going into second
tighten 1/2 turn and try again. higher number kickdown levers 4.2 or 5.0
do not like to much play. 72 inch pounds 6 lbs is pretty tight so the wrist snug thing I go 1.5 turns back.
Posted By: John_Kunkel

Re: help with 904 band adjust ! - 03/20/11 08:02 PM


Does the valve body have LBA? What type of rear band, solid or double wrap?

If you have overlap on the 1-2 shift with a LBA valve body chances are the rear band is too tight, double wrap needs to be looser than 2 turns out.
Posted By: moparjimbo60

Re: help with 904 band adjust ! - 03/20/11 10:22 PM

turbo action trans brake valve body, has a solid band . so am i too loose or too tight you think ?
Posted By: dartman366

Re: help with 904 band adjust ! - 03/20/11 11:09 PM

Quote:

turbo action trans brake valve body, has a solid band . so am i too loose or too tight you think ?


too tight, like I said before back it off 1/4 turn and try it again and see if there is an improvement, I adjust mine as tight as my finger's will turn the stud in the center and back it off 1 and 1/2 turn's, I run a TA valvebody with a 4.2 lever.
Posted By: joedust451

Re: help with 904 band adjust ! - 03/20/11 11:33 PM

+2, too tight, back it off like mentioned about 1/4 turn.
Posted By: moparjimbo60

Re: help with 904 band adjust ! - 03/21/11 02:05 AM

thanks sooo much for the advice . im fixing it tommorow . you guys are the BOMB !
Posted By: bonefish

Re: help with 904 band adjust ! - 03/21/11 02:47 AM

Quote:

thanks sooo much for the advice . im fixing it tommorow . you guys are the BOMB !


let us know how it works.
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