ratrapp Posted February 7 Share Posted February 7 does anybody know if a flexplate from a same year 2.8 s10 or camaro is the same as the 2.8 comanche?i think they should be externally balanced but i didnt know if they shared the same torque converter pattern. Link to comment Share on other sites More sharing options...
Greenjeans Posted February 14 Share Posted February 14 Nope. 3 bolts on the S-10 700r4 and 4 bolts on the Chrysler 904 trans. Link to comment Share on other sites More sharing options...
ratrapp Posted February 14 Author Share Posted February 14 i found that out but unfortunatly i don't think thats my problem.jeep has had a vibration since i bought and has slowly gotten worse over the last 6 months.its not in the tire /wheel and just had the driveshaft balanced and it checks out fine.found a broken motor mount but even after replacing both mounts and trans mount it made very little difference.i can tell the trans has been replaced before and was hoping that maybe someone had replaced the flexplate with the wrong one but i can see the counterweight on the flexplate and all the converter bolts are tight.you can feel the vibration directly over top of the trans tunnel.it starts around 45 and progressively gets worse to 65 and then kind of smooths out some.hoping its not in the trans itself. Link to comment Share on other sites More sharing options...
Greenjeans Posted February 14 Share Posted February 14 I wonder if it could be in your front suspension and just feels like it’s over the trans.. It sounds like you’ve done a good bit of work to eliminate possibilities. Vibes can be tough to find..good luck! Link to comment Share on other sites More sharing options...
ratrapp Posted February 14 Author Share Posted February 14 i don't think its in the suspension.its 2wd and i put new sway bar links and bushings on it.i also replaced all 4 shocks with good kyb gas adjust units.the steering wheel never shakes,its just you feel it in the trans tunnel.the rest of the front suspension is in good shape and even aligned it at my old shop.i thought about just replacing the harmonic balancer to see if it does anything but my visual inspection it seems the rubber isnt in too bad of shape.i had took the rear end cover off and checked it out.there was no metal shavings anywhere and the rear sounds smooth and quiet while driving.the vehicle is stock height so ive kind of ruled out pinion angle but who knows. Link to comment Share on other sites More sharing options...
Greenjeans Posted February 14 Share Posted February 14 I’m just brainstorming here, but I thought of something. If you rev it up and there’s no vibration in neutral… It almost has to be something spinning while you’re going down the highway. I don’t know if an automatic transmission can’t have a part to get out of balance and still operate. I’ve never heard of it. So that would leave tires and wheel driveshaft or maybe an axle? Link to comment Share on other sites More sharing options...
ratrapp Posted February 14 Author Share Posted February 14 you can feel some vibration when reving it up.it seems worse when its cold and you first start it up.ive had a race car engine that was not balanced properly and it feels very similar to this.the truck sat for years in a field and i wonder sometimes if this is why it was parked.it runs okay for 2.8 ,i just want to fix this vibration before it causes some other damage. Link to comment Share on other sites More sharing options...
hgeranium Posted February 14 Share Posted February 14 Just eliminating any possibilities. It’s certainly not the exhaust, correct? Link to comment Share on other sites More sharing options...
ratrapp Posted February 14 Author Share Posted February 14 no,after the trans mount replaced there are several inchs of clearance between the exhaust and crossmeber.i just wish i knew if the vibration started before or after someone had the trans out before me.i can tell the trans has been out by the cut cooler lines and missing nuts on the kickdown cable bracket. Link to comment Share on other sites More sharing options...
The86manche Posted February 14 Share Posted February 14 I wonder if the 2.8 was replaced with one that was internally balanced and the flex plate has not been neatrally balanced for it so its throwing things off? Link to comment Share on other sites More sharing options...
ratrapp Posted February 15 Author Share Posted February 15 that has crossed my mind several times.i need to find where the casting numbers are at and see what year it is.on a side note i finally did the 95 cherokee booster/master cylinder prop valve upgrade today.the original booster was leaking vacuum and the crown replacement didnt work at all.truck hasnt had brakes this good since it was put on the road last year. Link to comment Share on other sites More sharing options...
The86manche Posted February 16 Share Posted February 16 The casting numbers are passenger side of the block up front. Just under the cylinder head. Its similar to an sbc Chevy engine. Link to comment Share on other sites More sharing options...
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