2012 Needs a new Trans...thoughts on Jasper?

[socalluke]

Long story short....Towing abuse on a nasty mountain side road in 95 degree temps, (And the Shifter handle buttons to keep it in 4th or down was not working.)

And trans temps hit 285 degress.....so now it slips, shifts hard, and keeps throwing codes for 5th gear and 6th gear ration mismatches, then goes into 4th gear limp mode. Happens every time I get on the freeway.

So most shops are recommending replacing it. Jasper has the same 3 year/100k warranty (marketed with improvements to the weak spots of the trans) as the getting a re manufactured trans from Chrysler. BUT Jasper is $1000 less. Jasper trans is $3668 Chrysler trans is $4650.

1. Anyone have experience with Jaspers 66RFE trans?
2. Any other companies I should contact?

Local Shops are about the same quoting $500-$700 for the 8-9 hour job.

Only two shops said they could rebuild it. One for about a grand per speed. So $6k and another for $3800.

[coder]

A factory rebuild is the most reliable if it was my truck and I was planning on keeping it for awhile that would be my choice.

[gtomike60]

I got a Chrysler re-man in mine last year.
All updates and improvements over the years are incorporated'
In my application,it shifts better than the OE one did when new,and I got a 1 to 1.5mpg bump in mileage

[RustyPW]

Jasper has been hit and miss with their rebuilt assemblies over the years.

[PWJouster]

these are Jaspers current identified fixes of our 66rfe trans...
im on the chopping block, and unless Ram will replace my trans...im going for one of these.


1. 100% install a NEW line pressure sensor (transducer) to prevent
inconsistent shift quality and control correct line pressure (high
failure item).
2. We increase the Overdrive clutch from 4 line plate to 6 line plate
to increase clutch capacity (high failure item).
3. We remanufacture the Solenoid pack and test on a state of the art
tester prior to installing on the Transmission to assure proper
operation.
4. We install a NEW switch valve plug in the valve body to prevent
the bore from wearing and leaking fluid pressure-- which causes
second gear starts and loss of lock up function.
5. Case, valve body, and pump assembly are checked for flatness--to
prevent cross leaks that can cause low pressure, binding, and unit
failure.
6. All bushing and thrust surfaces are finished to 15 RA or less
---to prevent premature bushing or washer failure.
7. Transmission is tested with a controlled volume of fluid before
the valve body is installed on the unit--to test for minor circuit
leaks that can lead to performance problems.
8. Converter is remanufactured on a state-of-the art converter
aligner/welder to keep the converter hub run out to .010 inch or less
(OEM is .015 inch)--prevents pump bushing from wearing, front seal
leaks, vibration.
9. We plug the drain back valve circuit 100% on early applications
(OE valves like to stick and Late model units are built this way)
prevents delayed engagement in forward and reverse.
10. Test 100% cooler filter bypass valve (likes to stick) prevents
lack of lube if the spin on filter clogs up.
11. Apply thread locking bolt compound accumulator cover bolts--these
come loose allowing the overdrive accumulator piston to come out--
prevents loss of 3rd or 4th gear.
12. We install NEW speed sensors---because of high failure.
13. Update pump to the latest design---takes care of TCC release
issue.
14. 100% installation of new Jasper exclusive pump bushing prevents
premature pump failure.
15. 100% replacement of converter linings.

[PWJouster]

1. Anyone have experience with Jaspers 66RFE trans?

what did you end up doing for your transmission?

[socalluke]

Sorry @pwjouster I found a local transmission rebuild shop (that has been around for years with great referrals) and had them tear it apart to see what they thought. My towing ordeal had smoked the overdrive clutches.....

The shop rebuilt the transmission and put a shift kit in it for firmer shifts. (And maybe a couple of other fixes, that I can't remember.) Cost was $2700 OTD I believe. Which I thought was pretty good. (Just got back last night from a 900 mile tow through 100 degree + heat of Arizona valleys and Flagstaff hills. Trans handled it fine.