hi every1,
so i just put my modded valvebody today, it was done by maximum tuning. i also put the trans cooler too. but the car runs like crap. first problem was when i reversed. when i change to R, and let go of brake, it revers fine but as soon as i give a little gas ( till 1.5k rpm ) it jerks and dies. i had no problem with my trans before my mechaninc instal this. then it upshifts and down shifts very randomly and it does it constant, even when im not pressing gas and im on a leveled road. then once in a while it goes to neutral by it self then goes back in gear. i contact maximum tuning and he didnt know what was wrong and he said he was gonna talk to who ever did the VB and let me know. any idea whats going on? my trans never did any of this before the VB.

 

by the way, its a 03 with 60k miles.

 

They obviously did something wrong-at the very least, didn't put enough ATF in the transmission. Check that first.

 

yeah, well he told me that 5qt would b enough, but after the 5qt we checked and it wasnt reading, so i kept putting more and more and after 8.5qt it finally reads just a hairline under the line. but he said it was normal sence alot of fluid came out when we took the VB out and i installed the cooler as well.

 

8.5 quarts? Capacity is 9 quarts and I doubt the torque converter was emptied that much and I don't think a transmission cooler will add that much additional capacity-maybe needed an additional half quart when I put on my my old Chevelle. Check the fluid on level ground with the engine running. It might be overfilled now.

 

thats what we did, i checked with the engine warm and running on a level ground. and im guessing the cooler takes less then a 1qt or so.

 

im taking it to another trans shop tomorow, making sure everything is good on my part. do you think my dip stick is reading wrong? and can all these problem be coused by over filled trans?

 

Overfilled and underfilled can cause problems. So can incorrectly installed a shift improver kit.

http://www.procarcare.com/icarumba/r...autotrans3.asp

If the level is low, add the appropriate fluid through the dipstick tube. This is easily done with the aid of a funnel. Check the level often as you are filling the transmission. Be extremely careful not to overfill it. Overfilling may cause slippage, seal damage and overheating.

http://www.shoupsauto.com/FAQs.htm

Will it hurt to overfill the transmission fluid?

Not really, but because transmission fluid doesn't compress, and air does, severe overfilling may make the fluid become aerated. This could cause abnormal operation.

So, at the very least, overfilling can cause abnormal operation.

 

wow, i think thats the problem with down shifting and up shifting so many times. but i think the problem with reverse has either something to do with the VB itself or the mechaninc didnt put it right. thanks alot guys. i will post again tomorrow, after showing it to the other shop. and how many qt do u think i needed it in the first place?

 

Whenever I drain mine, I pour the old ATF into gallon jugs so I know exactly how much came out. That way, I have a pretty good starting point to know how much to put back in.

 

so, i just check my fluid again, and its still pass the first indentation but on th bottom line of the marked rectangle, and its not brown nor does it smell burnt. the shop that my dad goes to wasnt open so i have to try later but i should be getting some answers from maximum tunning today.

 

I believe it's 10 qts.

 

Nissan shop manual for says 9 quarts, just double checked.

 

i checked with another trans shop, and he said its either the TCC or its the lock up circute. so i called maximum tunning and they said the same and they said i could send it back.

 

so after about 10 days, i got my "fixed" VB back from maximum tuning, cus they asked me to send it back and they would redo it. the shop put it on the car, and now it runs even WORST. it still dies in reverse, now it dies in drive too. and it wont move, i cant do over 30mph. i have no clue whats going on. so i called maximum tuning and they didnt know whats wrong either. and my mechanic thinks they f*cked up the VB cus he is the second mechanic took alook at it and he said the first shop didnt do anything wrong. so i told maximumtuning to call the trans shop to c what the heck is the deal.

 

so they said that, they think the first shop that put it on cracked my VB, cus when they got it one of the bolts were in the wrong place. and if i send them a new VB, they will redo the new Vb for free. i donno, what do u guys think.

 

You mean they threaded a bolt into a hole it wasn't supposed to go? How did they manage to do that?

They owe you a new VB, it isn't up to you to supply it. They messed it up, they pay for a new one. That is why they (should) have insurance.

 

Where do you live? If going to maxtunning is a possibility then go there and have jeff or dan install it. They are good mechanics and good people. I have had them install two different vb's for me and never had an issue with either one; in fact the one I have now has probably 70k on it and shifts as crisp as the day it was installed.

Or you can install yourself, it is not difficult just a time consuming PIA without a lift.

 

O-rings probably didn't set right. Each gear has a respective solenoid, and with it are o-rings. When I first installed mine, it wouldn't shift automatically, only manually, reinstalled, worked perfect. O-rings.

 

well the thing is that when i send my VB in the first time, my mechaninc took all the bolts out, including the ones holding the VB together, and he didnt send those with. so when it came back "modded" he had to put all the bolts but 2 in cus it maximumtuning put 2 on just to hold everything in place. so maximumtuning thinks its my mechanincs fault and my mechaninc says its their fault. they r redoing my VB for free i just have to send them a new one which im guessing its gonna coast another $250 or so and my mechaninc is puting it in for free.

 

i wished i could have them do it, but im in chicago. i was actualy thinking about puting it together my self cus it didnt look that hard but its freezing here and i dont have a garage.

 

but they looked at it twice, opened it up and reinstalled it and the only posibility that they say is that there has to b a very small crack somewhere caused by the wrong bolt being put in the wrong hole, thats hard to c. cus everything else looks normal, i donno with the new VB and all the shipping money i paid, so far its coasting me almost a $K. it realy sucks!!!

 

Probably would have been better off just getting the TransGo kit and having your mechanic install it. Typically, the less hands involved, the less chance of a mistake.

 

So which do u recomend a VB mod or the TransGo kit? What is the pro and con between the 2?

 

Take your choice, a kit that your mechanic can isntall or a VB mod, already modded, tat your mechanic installs. My VB works fine, I went VB, OP should have gone w/ the TGSK. Personal preference, but the kit would be better since less people are involved. Exactly what Scottwax said.

 

so they are sending me a new one today, and now they say they think its the solenoids and not a crack cus i had them talk to the shop that put them on for me. they said the solenoid had to b changed around 60k miles anyways. so i donno. now i have two valve body but the second one (with the new solenoid) better work. the guy said that the new solenoid is gonna coast me around $250 or so to put on my first VB. so i donno if thats what is realy wrong with the first one or not. i might just put it up for sale and have the buyer deal with puting new solenoid.

 

k so my mechanic took a look at my VB, and checked my SES code. there was nothing wrong with the VB. one of my solenoids werent working. i think he said the bank 1 solenoids was throwing a code. i shouldve checked the code earlier, anyways i put one of the VB on sale, and if no 1wants it im gonna return it to maximumtuning.
heres the link for the VB if any1 is intrested

http://forums.maxima.org/showthread....82#post6228182

 

Ok, so what was the code?

 

Probably very similar. The VB mod comes ready to install (valve body is already modded) and the Transgo kit you install yourself by removing the valve body, taking it apart and replacing the stock parts with the Transgo stuff, not sure if you have to drill any holes in the separator plate like I had to when installing a B&M shift kit into a TH350 transmission. Transgo kit is a lot cheaper (around $120 or so) but if you pay someone to do the install, figure on about 3.5 hours of labor plus about 5 quarts of ATF.

 

First things first...did the solenoids fix your problem and if so, what are you impressions of the VB mod?

 

On the TransGo Reprogramming Kit, you have to enlarge and plug some holes in the separator plates and enlarge and drill new holes in the valve body itself.

 

i actualy ordered the solenoids today but wont get them till wed or so. and i put the old ones in the new VB and same crap, so its for sure the solenoids. i will let u guys know how it drives when i put it back on later this week. but, i was talking to my mechanic and b4 they touched the VB my solenoids were fine. so im thinking they screwed it up when they were fixing it, and they blamed it on the first shop that they put the wrong bolt in the wrong spot. cus right after i bought a new Vb from them, they called me up and they were gonna charge me xtra $250 plus the $330 for new VB to put it new solenoids. they said i should change them cus my car is almost at 60k miles. so i think, they knew they F ed up my solenoids, and they thought i was gonna pay xtra money for their mistake. so if no 1 wants the xtra Vb by this weekend i will contact paypal and file a complaint and ask for refund. what do u guys think?