no reverse and backfires!!!!!!!!!!!!!
 

hi there,
i have a grand voyager 3.3 auto , i have a problem with reverse (the car dont move)[:@], when i rev it up in reverse gear nothing happens, if i rev it up again then the car backfires, i have changed the fluid and filter in the tranny (before i noticed the backfiring) to see if that sorted out the reverse problem, it drives forwards ok ind 3 L.

any ideas anyone????????????????

peter

RE: no reverse and backfires!!!!!!!!!!!!!
 

What year is your vehicle? Have you double checked your fluid level to make sure it is where it should be? Not sure if your trans has a vacuum line running to it or not? If it does,you may want to check on that. Good luck!

RE: no reverse and backfires!!!!!!!!!!!!!
 

hi gold cruiser thanks for the reply, its a 1997 model, i think it has a vaccum line running to it, also when car is is reverse and i pump the foot brake the revs go up to 1000, as soon as i stop pumping the brake the revs go down to 500 and it has stalledtoo. also i did get the car to move in reverse at high revs (it only moved about 10 metres), i have checked the fluid again and again and added a bit more , when i changed the fluid i got 3 and half litres (UK) out ofit, is this normal? , how would i check/test the vaccum line

thanks peter

RE: no reverse and backfires!!!!!!!!!!!!!
 

You mentioned that you changed out the transmission filter and fluid. Didthe no reverse problem start right after you replaced the filter and fluid, or did that problem exist before you replaced the filter and fluid? If there is a vacuum line running to the transmission, I would just check to make sure that it is hooked up, and that the rubber hoses that are used in the line is good and snug, not lose or cracked. Trace that vacuum line from the transmission to the brake booster to see where you are picking up the vacuum from. From what you are saying, it sounds like it may be picking up vacuum from the brake booster. If that is the case, there should be a connection somewhere on the brake booster. Make sure the connections in that area are alsoa snug fit and not lose or cracked or disconnected for that matter. It really sounds like you have a vacuum leak somewhere. One way of checking to see if leakingvacuum is causing your engine to backfireis to disconnected the vacuum line that is running from your brake booster to your intake manifold, orto what ever is connected to at your engine. Now, plug the side that runs to the engine making sure no vacuum is leaking. You can then start your engine and try reving it again and again to see if it still backfires. Make sure that the trans is in the Park position and your hand brake is applied. Do not attempt to put the trans in drive or reverse. We are trying to determine what is causing the engine to backfire at this time. From what you said about the engine reving up when you step on the brakes sounds like a vacuum leak somewhere in the brake system. Try that and see what happens. Let us know the results.

RE: no reverse and backfires!!!!!!!!!!!!!
 

hi, i changed the filter and fluid after i lost reverse, after reading posts on here. i will be checking hoses etc today and will update, the weird thing is the car only backfires when im in reverse, i am taking the car to a tranny engineer tomorrow to do tests on it to see what codes are pulled, doing the on off on off on with the key only shows 12 and 55 which is normal when the battrey has been disconnected recently

thanks again
peter

RE: no reverse and backfires!!!!!!!!!!!!!
 

Does your engine rev up high at start up, and then drops down to alower rpm when ever you start your engine? My son had a Neon that did that. It turned out to be a defective PCV valve. His intake manifold was sucking in crankcase vapors through the defective PCV valve. His PCV hose ran from his valve cover to the intake manifold. And for some reason, when he stepped on his brake while the engine was running, the engine rpm would rise up like yours is doing. After we replaced the PCV valve the problem went away. I don't recall his engine backfiring at that time, and he certainly did not have any reverse problems. While in Park with the engine running, when you step on the brakes, do you hear like a slight gushing sound of air perhaps leaking from your brake booster? If your brake booster is bad or leaking, you willhear air leaking from it everytime you step on your brakes. I'm thinking if your transmission vacuum linewas tiedinto your brake booster, and if your brake booster was leakingvacuum, that could cause shift problemsand backfires as well. These are things worth checking into anyway. Keep us posted. Good luck!

RE: no reverse and backfires!!!!!!!!!!!!!
 

hi again, just checked for the sound of gushing air while engine was running and in parkwhile pumping the brake and didnt hear none, the revs when i start up are about 1250 then drops to just under 1000, not sure if the tranny has a vacuum line, if it does where would it be? what is a pcv valve

RE: no reverse and backfires!!!!!!!!!!!!!
 

Send me an email address. I can then send you pictures of what to look for. This is my email address:
Chevy66@hawaii.rr.com. Thank you, Tommy.

RE: no reverse and backfires!!!!!!!!!!!!!
 

ok, had scan done on car, the only code what was pulled was 12(battery been disconnected), he tested the tranny and the fault found was input rpms while in reverse were 650 and it should of been 0 (like it was in drive), he tells me its the reverse/low clutch which is the problem and needs total strip down as thats right at the back, i have found a reciept from the previous owner having work done on the tranny, it had seal and gasket kit, (frictions) clutch plate set ,(steels) clutch plate set, dextron 2 atf fluild 7litres , filter, additive lubeguard (which brings fluid up to atf 4) , geartrain and 3rd gear clutch carrier, this was done 2 and half years ago 6000miles, he didnt do a pressure test but would pressure problems be picked up by the scan tools? , is it possible it may be a piston problem what enagages the reverse? and can that be sorted though the side without removing the tranny?, i think the backfiring is related to the tranny somehow, but the brake problem might be something else, thank you gold cruiser for the info very interesting:)

RE: no reverse and backfires!!!!!!!!!!!!!
 

I'm not a trans man and can't help you there. I hope that some of the info I gave you will be of some help. Good luck and be sure to keep us posted with your results.

RE: no reverse and backfires!!!!!!!!!!!!!
 

Before getting a complete rebuild check to see if a reman is available sometimes its cheaper and a warranty is a great thing to have.

RE: no reverse and backfires!!!!!!!!!!!!!
 

well im trying another route at the moment.....
i took the car to a local chrysler dealer for afull service,( my emissions were high (did have error code for faulty o2 sensor)), i only had an engineers report from them (which listed the parts that were changed and parts that will need sorting out soon), i had no service sheet which tells me all the things that they have checked (i have loads from previous owners),inc engine, electrics, air con, steering and suspension, braking system, chassis and tranmission.
i have got nothing to say that the fluidlevel was checked by them and also my serpentine belt before i brought the cartwo anda half years ago was split down the middle, and it split again about 3months after the service, the problem being the tensioner(when the belt wasnt on it it was in line with all the other pulleys, but, as soon as the belt was on, the tensioner and belt where out of alignment by about 7mm this was missed by chrysler too..
i have changed the tensioner (fun job) and its all in line now (still got the old one though).....
so i am going to try to get chrysler to sort it out for free or i will be taking them to court
any views???
peter

RE: no reverse and backfires!!!!!!!!!!!!!
 

I would try to approach the Service Manager of the Dealership that did the work for you to settle things if possible withoutgoing to court.Going tocourt can be very expensive.Just make sure when you approach the Service Manager that you have as much documentation as you can get, to show that there was fault or neglect on their part.Do not give them the original documentations of any of the paper work that you have. Always give them copies. Type out a detailed letter of all of your claims. Be sure to include your intentions in this letter (which is stated below) before you see the Service Manager, just in casehe or sheis not willing to support your claims. You can then present a copy of that letter to them, and see what happens. If you are lucky, they will support you.If they decide not to support your claims,then your intentions as written in the letter would beto provideyour local TV station's, as well as the Better Business Bureau and Chamber Of Commercewithcopies of the letter that you presented to them. Most TV stations have adepartment where you can report problemsto, and they will do an investigation. This sometimes helps. Most companies don't like this type of publicity. If this does not help, then perhaps the Court would be your last resort. This would be my approach, anyway! Good luck!

RE: no reverse and backfires!!!!!!!!!!!!!
 

went to see the service manageron saturday, all he was prepaired to do was pull the job card to see if it was there fault or not, got a call from him today stating that chrysler do not check the transmission on theannual service i had(special offer £199.99), he said he asked the area manager if they check the transmission and the area manager said "no", he said thatthere was nothing on the job card about the transmission at all.
i live in the uk is this the same in usa???
it would take them 2 seconds to pull the dip stick to check it and write it down that fluid level is ok.
i am going to write to the general manager at my local branch and also to head office in uk.
i will keep you posted
peter

RE: no reverse and backfires!!!!!!!!!!!!!
 

hey pete you still having trans problems?get back to me i work on chrysler trans maybe can help,sounds like the trans need to be torn down for diag.let me know moe!

RE: no reverse and backfires!!!!!!!!!!!!!
 

yeah, i still got problems with transmission [:@]

RE: no reverse and backfires!!!!!!!!!!!!!
 

Present both of them with the letter I told you about. See what happens. When things are in writing, people pay more attention! I know I do! "Good luck".

RE: no reverse and backfires!!!!!!!!!!!!!
 

i have posted of letters, anyway i'm not holding my breath as i have talked the trading standards about my problem and it seems that garages in the uk have a licence to print money!!!

RE: no reverse and backfires!!!!!!!!!!!!!
 

hey tony,heres my thoughts on the trans.(if you have a 4 speed trans)if you have no reverse at all ive seen this once before but if you look at # 51 (if i post it right)on this breakdown of your drive gears its a plantery carrier ive seen where the center weld broke free.every thing else works fine and you still wont have a check engine light on .another possibilty would be the torque converter is locking up ,but ive never seen this happen with reverse only.let me know ....moehttps://w05.dealerconnect.chrysler.c...TE-AE_0013.gif

RE: no reverse and backfires!!!!!!!!!!!!!
 

sorry pete i called you tony!!!

RE: no reverse and backfires!!!!!!!!!!!!!
 

lol, no problem.
that makes sence to me, it was strange to just go without any notice, i did think it was a blockage, i have had a friend look at it, he says he can hear it engage then come out!!, he was going to take it off and strip and clean the tranny, but, then found out it will need recalibrating (training), i have also read the manual and it also says if the valve body is changed/reconditioned then it also needs recalibrating, i have removed and cleaned the valve body and the car seems to drive the same, will it need recalibrating or will it only need recalibrating if there is a problem (ie. not smooth upshifting/downshifting etc...) after parts are changed.
can it only be put into training mode with a scan tool??
peter

RE: no reverse and backfires!!!!!!!!!!!!!
 

http://img.betchuk.com/thumbnails.ph...=10&page=5

what picture number has the part #51 in?

RE: no reverse and backfires!!!!!!!!!!!!!
 

omg, i should have checked the low/reverse accumulator piston and springs when i removed the valve body,
this guy had lost reverse, he had no friction material left on his reverse clutch pack and one of his accumulater spring was broken.
http://img.betchuk.com/displayimage....=12&pos=14
http://img.betchuk.com/displayimage....=12&pos=35
tomorrow i'm gonna remove the valve body again and check the low/reverse accumulater piston and springs, well i've got nothing to lose (damm, i should have checked it before, lol), if i have got a broken spring then i hope i've still got friction material left on my reverse clutch pack,lol. or its gotta come off :(
any way i will keep you posted
peter

RE: no reverse and backfires!!!!!!!!!!!!!
 

cool pete, what your talking about is called quick learning the trans ,thats after you rebuild the trans you need to reset the clutch volumes.if you drop the pan look for metal in the pan. i wouldn't touch the valve body.just drop it down make sure the lever is in the park position before you drop the v body will make it alot easier.other wise the rod will hang up when you drop it.talk to you later.moe