4th slips out on new swap

integrawhat · 11-02-2004, 06:30 PM

i just swaped in a 95 b18c1 gsr engine and tranny into my 94 ls bout 2months back, i also run a 55 shot nos. last week i ran a z28 and won. my car seemed fine at the time but soon after the tranny started sliping out of fourth if i put any more than slight pressure on the throttle, also it grinds when i put it and reverse and shifts kind of harsh into second. i can feel the shifter pull forward when i get on the gas and it only has problems with the gears that i pull back on the stick. i can use all the info and help i can get its hard to race without 4th

integralover · 11-02-2004, 07:02 PM

sounds kinda like bad syncros too me. i chipped a tooth in my old tranny a year ago and needed a new one quick found some guy in this ghetto shop that had one and stuck it in my car now only to find out that the syncros are not going to last much longer.
also, did you use the same clutch out of the swapped engine or your old one?

94tegRS · 11-02-2004, 11:46 PM

before you go into reverse, put in 1st and let the clutch start to grab so the car moves a bi then shift to revers and since the car is moving a tiny bit it should go in easier, somtimes it will go in easier into reverse if you go into 1st or 2nd first and not even let out the clutch in that gear at all.

and the engine rocks a bit under hard acceleration which is why you feel the shifter move, shouldnt be alot though, and if it grinds into the next gear its probably a synchro.

Igovert500 · 11-03-2004, 12:23 PM

Could be a worn clutch paired with a bad 2nd gear synchro...is it cold where you are...sometimes in the morning, having a hard time getting into the low gears is normal...also when was the last time you changed your tranny oil?

integrawhat · 11-03-2004, 03:24 PM

i used a new disc but reused the pressure plate it was fairly new and both disc and pres plate are ACT there is no grinding while driving at all only into reverse and when car is still it shifts into 4th no prob it just comes out when i get on the gas.

integrawhat · 11-03-2004, 03:43 PM

most ppl i asked said syncros but haynes manual DOESNT mention this. it says "worn or improperly ajusted linkage, imput gearbearing retainer broke or loose, worn sift fork." does any body have any experience with these problems? and if it is syncros is this fixable (i still have ls tranny for parts).

all fluids honda spec or better and under 800 mi.

i know the shifter is supposed to move a little but it seems exessive and looks like the stick is being pulled out of fourth could motor mount inserts stiffen this and prevent the gear from comming out?

94tegRS · 11-03-2004, 03:54 PM

maybe the stock inserts are broken, ive seen it happen a few times. also I personally dont see how the synchro would make it pop out of gear, its just supposed to match the gear to the transmission input shaft speed when shifting into 4th and then its job is over as far as I know. and no grinding when driving? doesnt sound like synchros then , when they start getting bad then you hear it grind when you shift into the gear.

integralover · 11-03-2004, 04:04 PM

i have yet to hear how the clutch is? new, old? worn clutch pads can do that. and it is a b18c engine and tranny. i doubt the best of care was taken in preserving the life of both. having worn clutch pads can cause the tranny to grind. it is also the same with the syncro's. they help to line the gears up when shifting. if they don't line up quite right then, you have grinding. i'm not quite sure about it poping out of gear. but i would definately check on the life of the clutch and consider the wear on the syncro's.

integrawhat · 11-03-2004, 04:28 PM

at time of install clutch disk was brand new as was the fly wheel heat shield the clutch pressure plate was reused from my old ls engine with under 800 mi on it and as far as the clutch i took off the engine it wasnt in that bad of shape do you think this could be caused buy the pressure plate getting "softer"

94tegRS · 11-03-2004, 06:49 PM

I am just wondering how a worn clutch disc will cause the tranny to grind? sure it wont grab good when letting the clutch out cuz its worn, but it will just make the pressure plate friction area not as far from the flys friction area when pedals out but when the press the pedal theres still the same amount of fluid movement as before in the line so it will disengage, and I dont see how it will cause grinding when the clutch isnt engaged at all.

have reasoning behind this?

integrawhat · 11-08-2004, 05:00 AM

ok so new development? i was just out driving and 4th slips out like it has been and i figure out that i can put it back in fourth without toutching the clutch, so i try the other gears and once i get it in first i can go through every forward gear with out touching the clutch and it doesnt grind at all. sometimes i had to tap the gas to get it to go in but that was it. i found this pretty strange and wonder if this all could be blamed on the clutch. any ideas? i need help fast i hate bustin my nuckles when its cold out!

94tegRS · 11-08-2004, 11:53 AM

you can do it on any car withoutu the clutch. upshifting light pressure and it goes right in when its ready and downshift go to neutral and rev to a bit higher than you thin it neds and light pressure and as the rpms fall to the right point it will go in. can you just hold it in 4th gear when driving or does it not like driving in 4th?

integrawhat · 11-08-2004, 04:05 PM

no if i try to hold it in fourth it still tries to pull itself out. when i do try to hold it in it feels like the tranny is about to be ripped off the engine. and the whole no clutch shifting thing is new to me it never did that before and ive never been able to do it on another car. i could take it out of gear but never put it back in without the clutch.

integralover · 11-08-2004, 04:13 PM

clutches seem to be very difficult for people to understand. me too. i just know that when my clutch was going sometimes it would not go into gear and sometimes it would grind into gear. when the clutch does not hold true like it should, many things can start to happen. a soft pressure plate could be the prob. the install could also be a prob. where the pressure plate bolt torque'd like they should have been?
since you did the swap you might have to rethink exactly what you did to the clutch. i know ehen i did my swap i got the tranny back on the new engine and was getting ready to put it back in and noticed i left my pilot bearing out. had to take it all back apart.

well atleast i caught it before i put it all back together.

Igovert500 · 11-08-2004, 06:37 PM

Now I'm thinking its a shift linkage bushing...I just heard a similar problem described in the 3000gt forum...guy had it slip out of 1st and 3rd and he would need to hold it in physically.

Since you are having problems with lower gears, reverse, 2nd and 4th...I think this maybe your problem...the guy mentioned that it was a $20 fix.

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