Trembling in 4th gear ?

[Gav'sPurpleZ]

hey guys,
took barney out today since i replaced the battery....didnt notice anything on the way to my parents house ( about 8 miles away )
BUT
on the way home cruising in 4th gear ( automatic ), around 55-60mph and low rpm....i notice when i gave the car gas it felt like trembling towards the rear of the car. i would like to think its just getting the cob webs out but this did not feel normal.

any thoughts ? it didnt feel fuel or spark related....when i hammer the car it still goes.
trans ? rear end ?

wtf

Click to read more...

 

[byronchrisp05]

U joint?

 

[Turk]

What if it's in 3rd gear at that speed?

 

[Gav'sPurpleZ]

u joint has been replaced @ the rear end...and wouldnt it be bad at all times ? off the line ?
i drove through my subdivision at 30mph and stop signs and didnt notice anything.

turk,
i put it in drive ( as opposed to over drive ) and it did the same thing, but you can tell the rpms were lower.

 

[Dasfinc]

u joint has been replaced @ the rear end...and wouldnt it be bad at all times ? off the line ?
i drove through my subdivision at 30mph and stop signs and didnt notice anything.

turk,
i put it in drive ( as opposed to over drive ) and it did the same thing, but you can tell the rpms were lower.

My ranger had a tremble/vibration when I first bought it with the 4 cylinder years ago. Only happened between 25-30mph and only in 3rd gear with the auto. Replaced both U-joints and it went away, I thought it should be all the time too if it was a U-joint but apparently it isn't always the case.

 

[Gav'sPurpleZ]

i will jack up the rear end and check the u joint this week...............wtf this POS

 

[Dasfinc]

Dunno how it is with the F-bodies, but I'd imagine a carrier bearing failure/failing could do that also if they have them.

 

[willizm]

Did you put in a torque converter recently?

 

[HILROD]

F-bodies have a 1 piece driveshaft so no carrier bearing. They do eat pinion bearings a lot. A solid crush sleeve helps them live longer. A bad pinion bearing at first is like a growling rumble, bearley heard or felt. It gets louder and vibrates more, as time goes on.

 

[Gav'sPurpleZ]

willz, TC has been in for over 4 years..........

hilrod, maybe i'll bring it by and we can go for a ride.

 

[willizm]

Ok, thought it sounded like the converter was hunting where it constantly is locking and unlocking at cruising speed. Doubt it would be that since you would have probably noticed it right after install sone years ago.

 

[DTB_LS1]

The d/s itself could be out of balance. My d/s tossed a weight last year and I didn't notice at all till the car got over 50mph.

 

[HILROD]

willz, TC has been in for over 4 years..........

hilrod, maybe i'll bring it by and we can go for a ride.

That's fine.

 

[Gav'sPurpleZ]

i went from a steel d/s to an aluminum when i had it dyno tuned....but that was 3 years ago........

eh, this kind of sucks

 

[HILROD]

Whatever it is it should be no big deal. Even the pinion bearing is only a couple hour job tops. Stop by when you get a free minute.

 

[Gav'sPurpleZ]

sounds good.........looks like rain almost all week...except for tuesday.

hawks play tuesday..........i will let you know

 

[HILROD]

 

[Gav'sPurpleZ]

if i can get out of work on time, i should be home by 5, which means i could be by you no later than 530....which provides me time to get home by 630.

let me know if you will be around this evening....if not, no worries....

 

[Gav'sPurpleZ]

u joint has been replaced @ the rear end...and wouldnt it be bad at all times ? off the line ?
i drove through my subdivision at 30mph and stop signs and didnt notice anything.

turk,
i put it in drive ( as opposed to over drive ) and it did the same thing, but you can tell the rpms were lower.

so, as i think about it some more.... the u joint in the steel d/s was changed
when i bought the used aluminum d/s i left the existing u joint on because it didnt have any play.

so i guess this could be the culprit.

 

[HILROD]

if i can get out of work on time, i should be home by 5, which means i could be by you no later than 530....which provides me time to get home by 630.

let me know if you will be around this evening....if not, no worries....

I'l be home around the same time so that's good.

 

[Gav'sPurpleZ]

i know we had to heat up the u joint so that the glue would ooze out ( on the steel d/s )

is it the same way for the aluminum d/s ?

 

[mr.gto]

I have been having this issue as well...... however on my camaro the passanger side rear shock is totally blown out and the vibration is coming only from the right rear from 50-62 mph so im guessing the shock has something to do with mine possible.

 

[Gav'sPurpleZ]

should the trans be in neutral in order for me to check for play ?
i had the car on ramps yesterday, but the trans in park. d/s felt pretty solid to me.

i did notice some dampness on the yolk and some fluid on the left side rear seat tub. odd thing is, the fluid was an orange-ish color. checked diff and theres fluid ( gear oil is that greenish color anyways )

i did notice that the bottom of the stock cover is slightly bent...i sprayed the shit out of everything with brake cleaner and will recheck.

anyone heard good/bad reviews on proform diff covers ?
speedinc has one for 129.99 ( free shipping ) and it comes with fluid and mounting bolts.

 

[Gav'sPurpleZ]

http://proformparts.com/product-exe...NUM_BLACK_PERFECT_LAUNCH_LOGO/category_id/297

looks like the manufacturer send everything needed........so its not like speed inc is doing anyone favors.......but free shipping is nice.

 

[HILROD]

The trans should be in neutral.
If the driveshaft/universals are tight and greased well, check the pinion bearing. A bad pinion also can cause a leak at the seal.