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Forum nameManual Trans - NV-T350
Topic subjectproblems after ATX to MTX swap
Topic URLhttp://forums.2gnt.com/dcboard.php?az=show_topic&forum=34&topic_id=5714
5714, problems after ATX to MTX swap
Posted by DSMTalon, Dec-31-69 06:00 PM
ok so i swapped out my atx w/ an mtx from an avenger.. ok this is what i used from the avenger: tranny, master cylinder, clutch & brake pedals, vss connector. ok from a 2gnt: shifter assembly & cables, along w/ a mtx computer. for a clutch i went w/ a SBC OFE clutch, and i replaced the slave cylinder cuz it was leaking. so now after installing it and getting everything bled (dot4 synthetic brake fluid) and filled w/ mopar fluid for the tranny... the sucker grinds between 1-2...but only above 3k rpm. below that it will go into gear with some effort, but no grinding. and with all the other gears the tranny is hard to shift into gear, but it doesnt grind, it just required excessive effort to get it into gear. but w/ the engine off, it shifts into gear like butter. so whats up with that? also, i did the clutch restrictor mod when i installed the slave cylinder... and the clutch pedal seems "soggy" for lack of a better word. ive bled the clutch quite a bit, even used a vacuum bleeder on it and still havent seen an improvment in pedal feel. do i need to put back in the restrictor? could that be part of the hard to get into gear? and whats up with the 1-2 thing? bad synchros? i wouldnt think so cuz the tranny shifted fine in the avenger w/ no known problems.... any help would be greatly appreciated guys.

also: is there any difference between the atx axle shafts and the mtx axle shafts cuz i noticed today when i had my car up on the lift that the passenger axle shaft isnt seated all the way in the differential, and despite my best efforts i cant get it to fully seat... do i need to swap it w/ a MTX one? or am i just being retarted with it?
5715, RE: problems after ATX to MTX swap
Posted by Star Turbo Talon, Dec-31-69 06:00 PM
either the trans is shot....I would take that assumption just yet, or you have air in you clutch lines. The clutch lines are difficult to get the air out of. I reverse bleed them by forcing fluid up from the slave cylinder.

Terry
5717, RE: problems after ATX to MTX swap
Posted by Chamuko, Dec-31-69 06:00 PM
Its going to take you a good two bottles from a completely dry system to get most of the air out and everyting tip top.

I would second the tranny is shot argument though. Is the clutch pedal bolted down completely? so that when you push on it its just the pedal and not its base that moves? Is the master leaking at all? Are all the clips on the cables and brackets there?
5720, RE: problems after ATX to MTX swap
Posted by DSMTalon, Dec-31-69 06:00 PM
yeah the clutch pedal is bolted down well. i checked out the shifter cables and noticed that the brackets on the tranny were moving quite a bit so i re-tightened the bolts, one was a little loose..and re-intalled the shifter cable clips... that helped out a lot with the shifter feel. as far as the master cylinder goes. im almost positive the first seal on it is shot, so im gonna replace it later today and go from there. otherwise im still having problems w/ 1-2 synchro... it wont grind if i shift below 3k...anything above that and forget it. so ive either timed my shifts to get second, otherwise skipped it and went for 3rd. anybody got a Part # for that shaft that the 1-2 syncrho is on since ive heard that the synchro isnt servicable?
5721, RE: problems after ATX to MTX swap
Posted by DarkOne, Dec-31-69 06:00 PM
If you want to pay $900 for it, by all means. You can look up the number in CAPS on the main site.
5722, RE: problems after ATX to MTX swap
Posted by Chamuko, Dec-31-69 06:00 PM
yeah, its more of a PIA then its worth. Your better off finding a good tranny and keeping that one for parts. Did you buy this one in good condition? Did you drive the car it was on? or was it a shot in the dark?
5723, RE: problems after ATX to MTX swap
Posted by bluevenge, Dec-31-69 06:00 PM
the axles are the same u should be able to get it to go in...
the syncro prob got screwed the first time you shifted to second with the shifter bracket not tight...
5724, RE: problems after ATX to MTX swap
Posted by DSMTalon, Dec-31-69 06:00 PM
yeah the car the tranny was bought out of was in good order..all except the HG went on the engine.. but i had drove the car about 3 weeks before the HG went... and it shifted fine. but i dunno something could have happened in the mean time... but i guess i can live with it. anyway as far as the axle shaft goes i swapped it out w/ the original from that mtx tranny and it went in no problem...so thats one problem solved. while i was doing that i checked out the shifter linkage and found that the cable bracket had a tendency to crawl around a bit and one of the C clips wasnt installed properly so i straightened that out and tightened up the bolts for that bracket so they were mucho tight and then i swapped out the master cylinder for a rebuild and re-installed the clutch restrictor...and well now it feels a LOT better... goes into gear a lot easier and what not.. but still the 1-2 synchro is still fuggard'd. but ive figured out how to live with it. just wait a few seconds to grab second and it'll go in like butter. now just i think i just didnt lube up the TOB quite enough or something... cuz i get this obnoxious squealing in the tranny...and it goes away when i press in on the clutch pedal just a little bit. so can i expect that to eventually go away or will it haunt me for a long time? i lubed that sucker up w/ some grease on the shaft, around the bearing and i used a hyperdermic needle to inject a little grease in the bearing itself. but i didnt get real carried away cuz i didnt want grease everywhere inside the housing. i guess the last question to compelete this little project is what can i do for a shift boot? i want to upgade the knob and boot for the whole little cosmetic thing... but do i need to get a factory boot first? or just adapt and overcome?
5729, RE: problems after ATX to MTX swap
Posted by Chamuko, Dec-31-69 06:00 PM
That does sound like the TO bearing, I had a friend do it while I was doing something else... he broke the tab. I Ghetto fixed it, it squeaked at first, but now is quiet ( 1.5K miles). The synchros... sounds like they just went, bad driving habits, age and imrpoper lubrication could all be to blame.

Sounds like your almost there. The only thing with the factory boot is that it has a plastic rim at the bottom that screws on to the console. other then that its just vinyl sewn together.

The knob just screws on, so you can get pretty much anything that fits.
5730, RE: problems after ATX to MTX swap
Posted by DSMTalon, Dec-31-69 06:00 PM
im almost positive its the TOB...but im not too worried about it. if it squeals it does... maybe it'll just scare away the little kids. but as far as "there-ness" goes.. im there except for the little cosmetic upgrade of replacing a worn out shifter knob and the lack of a boot..one thing i did notice that was missing from the writeup is that i did have to change the flex plate cover to one for the MTX to get all the right bolt holes. otherwise everything else was about as straight forward as you can get. and i must say im liking it. :thumbsup great mod.
5734, RE: problems after ATX to MTX swap
Posted by Chamuko, Dec-31-69 06:00 PM
really? I used my AT one, sure it was not backwards? Ill add a note about it i guess.

Take lots and lots of pics for others?
5735, RE: problems after ATX to MTX swap
Posted by DSMTalon, Dec-31-69 06:00 PM
lol no sorry i didnt get to snap any pics...i was too embarrased to do it... my car is a rag. i can take some pics of the completed install if you want...but as far as the flywheel cover goes, yeah on my 96 i had to change it to one for the mtx otherwise the clutch slave bolts wouldnt go through the cover. that and i had to swap out that passenger CV shaft (for a mtx one) cuz it wouldnt seat fully. if you want i could probably get you drill bit sizes for cutting out the holes for the master cylinder..otherwise everything else was as straightforward as could be expected.
5737, RE: problems after ATX to MTX swap
Posted by Chamuko, Dec-31-69 06:00 PM
yeah any info you think you would have liked to have had ahead of time would be great. I also think its easy as can be and dont see why people get intimidated or panic.

Nice to note that on your tranny you had to use different axles. I show the same part numbers and I re used mine.
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