Does a rebuilt tranny fix the harsh shifts?

lars0247 · **Joined:** Sat Oct 12, 2013 12:09 am **Posts:** 98

For all of you who have had problems with rough shifting or binds, did a new, rebuilt, or low mileage replacement actually fix the problem?

I have put up with this too long, and am starting to get really bad binding on the 3 to 4 shift with CVI values in the 180s.

flash7210 · **Posted:** Wed Aug 12, 2015 6:21 am

What's a CVI value?

dirtmover · **Posted:** Wed Aug 12, 2015 8:17 am

If you've got access to CVI values I assume you have a scanner that can perform a quick learn? Did that fix it temporarily?

lars0247 · **Joined:** Sat Oct 12, 2013 12:09 am **Posts:** 98

Quick learn fixes it temporarily until it learns back to a high enough OD and/or 4C CVI to cause a bind.

Many others have experienced this problem without any solution. Omaharacer said he replaced his tranny with one out of a 2009 Dodge Ram, after his failed. Before this, he described the harsh shifting which as far as I can tell is binding due to clutch overlap with high CVIs. At this point, none of the suggested fixes seem to work for me, and I am mainly trying to determine if anyone who put in a different tranny finally eliminated the problem.

ebbnflow · **Posted:** Wed Aug 12, 2015 7:00 pm

Subscribed. I'm about fed up too Lars.

Yeti · **Posted:** Mon Aug 17, 2015 4:31 pm

you know when the hars shift come .....and inadvertently let off the foot from the gas ...........wrong ......give a littel more gas is not a cure but in my kj work

ShaqDiesel · **Posted:** Tue Aug 18, 2015 12:45 am

I'm starting to experience harsh shifting as well - Jeep is at 113,000 miles. It is occurring between almost all gears at different times. I'd be interested to see data on this.

Yeti · **Posted:** Tue Aug 18, 2015 3:55 am

is not the normal harsh shifting , normally occur at cold transmission fluid between 2nd to 3th only when the OD clutch is not engaged

flash7210 · **Posted:** Tue Aug 18, 2015 5:55 pm

For those with harsh shifting issues, do you have the TransGo kit?
The shift kit may cause shifting to be a bit harsher but shouldnt be too bad.

Overall, it may just be a valve body issue.
Like maybe a little piece of crud interfeering with valve movment or solenoid movement.

On the other hand, these transmissions are supposed to adjust for clutch wear.
So that could also be part of the problem.

Try driving normally with OD-off to see how the 1 thru 3 shifts feel.
Then run it up 53 mph and turn the OD-on. This will force a hard 3-4 shift.
See if that makes any difference.

Hexus · **Posted:** Tue Aug 18, 2015 8:14 pm

I have the Transgo kit, I notice a firmer shift from 2-3 and 3-4 honestly. I only had harsh shifts and shifting issues when my Solenoid pack was about to go. When it went out, I got a new one and did a full service. The self-cleaning float in the Transgo kit makes a huge difference according to a friend who owns a transmission shop where I did the work (Myself, rented a lift for $50). Apparently the original float allows too much crap to get by it.

lars0247 · **Joined:** Sat Oct 12, 2013 12:09 am **Posts:** 98

Hexus,
What do you mean by float? If the Transgo kit would fix this problem, I'd install it right away.

flash7210 · **Posted:** Wed Aug 19, 2015 7:41 am

The float valve he mentions is actually called the F-R valve. (Forward-reverse)
It doesnt act against any kind spring, it just moves in the direction of fluid travel. Opening one path while closing another.
The other thing the transgo kit offers is a stronger plate that holds the valves and springs in place.

Hexus · **Posted:** Wed Aug 19, 2015 9:16 am

Yeah, the F/R valve. The one in the Transgo kit is self-cleaning, and designed differently than the original one inside the Solenoid pack. The one in the original Solenoid pack allows particulates to pass by the valve because it doesn't completely close off the channel. The self-cleaning version completely fills up the channel.

This picture shows what the kit includes. The replacement springs are stiffer, the plate is thicker, and the valves all get new gaskets and rings on them.

Yeti · **Posted:** Wed Aug 19, 2015 9:38 am

I have a transgo shift kit ....repair only , but I always have had my harsh shift , the only way is to decrease a littel bit the torque in the range where the shift occur at low rpm and give a little more gas , but only when transmission is cold ....try it

ebbnflow · **Posted:** Wed Aug 19, 2015 12:41 pm

My hard 2-3 shifts started happening about 15k miles after I installed the transgo kit in the VB and front pump.

I put the euro TC in at the same time as the transgo.

Since the hard shifting has occurred, I replaced the solenoid pack, both internal filters (with Mopar ones) and new ATF+4. I replaced u joints and lubed the drive shaft spline. Serviced the rear end. Nothing has worked to eliminate the bang from 2-3 except the quick learn. Quick learn fixes it for a week or two at best.

The weird part about it all is that on occasion it will shift perfect, but most days it bangs.

I would also like to know if a transmission out of a newer dodge 1500 will solve the problem. The reason I think it might not is because on occasion it will shift perfectly from 2-3.

lars0247 · **Joined:** Sat Oct 12, 2013 12:09 am **Posts:** 98

Omaharacer detailed his tranny replacement with a low mileage unit from a 2009 Dodge.

viewtopic.php?f=5&t=82005

He described his original tranny was shifting harsh before it failed.

He to my knowledge never posted a follow-up as to whether the replacement tranny fixed the harsh shift issue permanently. I replied to his thread, and sent a PM to him, but it has gone unanswered so far. I think there was at least one other person who said replacing the tranny fixed this issue, but I've never heard anyone confirm this worked long term.

I think a replacement low-mileage tranny would fix this simply because if not, this problem should have been prevalent on these Jeeps when they were relatively new and had low miles. I am looking for confirmation on this.

flash7210 · **Posted:** Wed Aug 19, 2015 9:46 pm

The weird part is that not every Liberty CRD has this hard shift problem.
I occasionally get the hard 2-3 shift. But it's only under light throttle at 17-19 mph and very rare.
And sometimes, if I am driving at below 20 mph for a long time, I will pull the shifter down to 2nd. Just to hold it there until I can get more speed. (i.e. When off roading)

lars0247 · **Joined:** Sat Oct 12, 2013 12:09 am **Posts:** 98

I do not have the F37 program in the TCM. Do any of you who also have rough shifts have the F37 update?

ebbnflow · **Posted:** Wed Aug 19, 2015 11:27 pm

I have a GDE TCM which I installed at same time as transgo kit and euro TC at 85k miles. This problem started 15k miles after the install of the above items. Mileage was at ~ 100k when the 2-3 issue reared its ugly head. I am at 120k now.

lars0247 · **Joined:** Sat Oct 12, 2013 12:09 am **Posts:** 98

I have the GDE trans tune too, but I also have another TCM with the pre-F37 standard program.

Both exhibit the harsh shifts.

I don't think these programs cause the hard shifts per se, since you went 15K before yours started doing it. I have a 135K on my Jeep. I bought it at 120K, and it has done it since I've had it.

Does a rebuilt tranny fix the harsh shifts?

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