Okay so my truck just hit 225,xxx... and the transmission has been acting up for the last 20,xxx and its just getting worse.. its an automatic and whoever had it before be drove the ***** out of it. Going from 1st to 2nd depending on how much gas you give it the gears will rub/grind and im tired of it.. just wondering if i should have the transmission shop just put a new one in it, or rebuild it completely.

 

There are no "NEW" its all going to be used. But I'm sure you ment new to you, but just wanted to clarify it.

It all depends on the quality of the shop and where they get their supplies and or transmissions. It might be best to get another transmission but you run the risk of the case being damaged. Or yours might already be damaged and they might not find out till its running.

I tried to get another transmission instead of getting mine rebuilt which no one had one in stock and would take longer then rebuilding to get one. I ended up taking it to a shop that said they have one in stock and turns out they just rebuilt mine and lied to me when I pointed out. I had to continue take it back unitll they fixed it correctly, which is why I didn't want my same case.

 

the closest thing to "new" would be reman probably from someone like jasper; you'd be better/cheaper to get yours done; I have not seen amny bad cases on these; and if there was the front case on a 2wd is the same as the one on a 4WD the only difference is the rear case and full sized trucks had the same trans... so it would not be that hard to find one!

 

Dump the fluid, change the filter and fill back up with atf+4 and the lucas transmission fix additive as a cheap last try. The stuff worked wonders on mine. It used to shift hard from first to second and would be rough going from throttle to let off to coast. Once I did that everything was 95% better. Its almost perfect and very doable now. Mine has 237,000 on the original 42rh

 

hay lam moe normaly on the 2nd gen side. i found an external trans fluid filter. go to auto zone. get a 2210 magna-fine filter. it fits chryslers 3/8 size coolant tubing. youll need to cut some tubing out, and put a bit of a bulge on the ends. like they used to put on fuel lines. it is for trans fluid and power steering fluid. MUST use high pressure hose. there is one for the smaller size, for some non-chryslers? wix 58964 5/16 tube size. i like this filter cause i think it will make having to go into the trans will be lessioned. good luck.

 

NO! skip the Lucas. that stuff did my 46 RE in! I had a plow truck that was working fine that I decided to do a fuid/filter change on (and no I do NOT believe the BS about changing fluid and filter causes trannies to die I have done that very service too many times to count over the years)
but that Lucas crap is thicker than molasses and has a hard time gettin thru the filter; I put a funnel-full in and had to chase it with ATF to thin it enough to flow Within 10 miles a formerly perfectly working trans was dead. I added it thinking that since just dropping the pan does not get all of the fluid out meaning there was still so much old fluid in the tranny that it would be a good way to replenish the depleted additives but not

I know I won't ever use it again. I have used others of Lucas' products and while I can't necessarily say they are any good, they didn't give me catasstrophic failure right after their use like the trans stuff did

 

older chryslers used 5/16 cooler lines.
but the truth is these are universal and not made "for" any particular brand of vehicle

 

Ive seen a few different trans die after filter and fluid change. Reason being the previous owners did not change fluid on regular basis and when the filter and fluid was changed it knocked loose all the trash and clogs the new filter and burns up the trans. Ive found it best to not change fluid and filter on older high milage trucks with oem tranny. If I do anything then I'll take it to a shop and let them run it through the machine to make sure all trash is removed from tranny before new fluid is put in and driven. Thats just the luck that ive had and cant speak for everyone. If you dont want to rebuild your tranny then I would recommend any product from Jasper. I worked for a authorized Jasper dealer and installed many different engines and trans from them and I personally only had 1 engine that got replaced under warranty and the customer paid no money at all for the labor, parts, shipping, fluids, nothing period. Jasper takes alot of pride in there product and top notch customer service. If you decide to have it rebuilt make sure you do alot of research for the right shop to build it for you. There are a ton of shady shade tree mechanic's out here in the world and they are the one's that give the good technicians a bad name. Good luck with your truck and hope this was helpful in some way since I rambled on for awhile lol.

 

42rh = 5/16, 46rh = 3/8. Have them check it for tolerance. Then rebuild if possible. I am a firm believer in matching engine/ tranny when possible.