4th gen 68RFE or Aisin

[Wiredawg]

Guys,

The first few pages actually have good info on both trannys, then it went off the rails and still is. The initial info is very relevant to the OP question.

Cheers, Ron

 

[Timd32]

Guys,

The first few pages actually have good info on both trannys, then it went off the rails and still is. The initial info is very relevant to the OP question.

Cheers, Ron

I agree it starts out with good info that does not need to be rehashed. Get the Aisin and drive the wheels off the thing, enjoy the time spent not worrying about what you are putting behind it from a duty cycle perspective.

Limit yourself or don't, could you imagine the side effect list if one was needed from that thread.

May cause dizziness, headache, confusion, anger, loss in all faith for humanity, reborn faith in all of humanity.....

It truly shows no matter how crazy an idea the TDR will always try to get you the best information.

 

[Cummins12V98]

"If I can’t feel the shift then it’s sloppy or robbing power. Not to say my trans is even “firm”, but you know when it shifts...like you should in a truck."

YES, I say the AISIN shifts like a quality built trans. ONLY thing i would change is to lockout 1st gear when not towing!!!

 

[DHayden]

May cause dizziness, headache, confusion, anger, loss in all faith for humanity, reborn faith in all of humanity.....

You forgot "Anal leakage"

 

[Cummins12V98]

I thought the proper term was “Oily Anal Leakage”

 

[beaverguy]

So, how happy are those of you who have gotten the 68RFE instead of the Aisin? I am thinking about replacing my 02 HO and I'm just not sure which 1 I need (want). I tow a 16k gvw 5th wheel, and have decided if I get a different truck, it might as well be rated for the weight I tow. I would like a dually, but Mama does not...so it will probably be a SRW.
Our service trucks all have Aisins, but I have not been able to drive a 68RFE equipped truck.

Cheers,
D

I have a 2016 2500 4x4. It has the 68 transmission & 3:73 rear ends. I pulled a 16000# fifth wheel all over Alaska & British Columbia. No problems what so ever. I do think it would handle the weight better in the mountains with 4:10 rear ends though. To me the 68 transmission is about bullet proof and much cheaper than the aisin

 

[JR]

I have a 2016 2500 4x4. It has the 68 transmission & 3:73 rear ends. I pulled a 16000# fifth wheel all over Alaska & British Columbia. No problems what so ever. I do think it would handle the weight better in the mountains with 4:10 rear ends though. To me the 68 transmission is about bullet proof and much cheaper than the aisin

Did you change your gear ratios? What did you use, OE, aftermarket?

 

[beaverguy]

Did you change your gear ratios? What did you use, OE, aftermarket?

I'm sorry I guess at 71 you have brain farts every once in a while My gear ratio is 3:42 not 3:73

 

[HVAC2]

One thing I've noticed the 68 will not get warm even when running 210 and above on coolant.

 

[HVAC2]

Here is one at 217. Bone stock?? I dunno it seems like it should get warmer.

 

[AH64ID]

The trans cooling system on these trucks are HUGE and if the torque converter is locked it's really hard to get them above 165-167°.

 

[HVAC2]

I love it. No mountain anxiety, uphill or downhill.

 

[teasac69]

I know this is late but just another IMHO

I pulled 42’ fiver with 68RFE into Rocky Mtn Natl Park but coming out through Central City I smoked that bugger so bad they could only use carcass to rebuild. Got home and bought Aisin never looked back. Pulls my 18,500 TT never getting above 180.

 

[jacknife]

Owned a 14 with a 68rfe . it did fine until you got in stop and go in hot weather 220 was not uncommon . The transmission light never came on and my son has it71000 miles later towing 14000 about 40000 miles . When i orders my 2020 Longhorn I went with the Aisin . PU

 

[Cummins12V98]

Owned a 14 with a 68rfe . it did fine until you got in stop and go in hot weather 220 was not uncommon . The transmission light never came on and my son has it71000 miles later towing 14000 about 40000 miles . When i orders my 2020 Longhorn I went with the Aisin . PU

Have you done the same stop and go in same weather conditions with the AISIN? 220 is not bad at all in stop and go.

 

[HVAC2]

I can't get the trans temps to move beyond 167, even when coolant hit 217, up mtn passes, passing everyone tugging 8500lb in heavy headwinds.
Could it be a 2wd runs cooler?

 

[AH64ID]

I can't get the trans temps to move beyond 167, even when coolant hit 217, up mtn passes, passing everyone tugging 8500lb in heavy headwinds.
Could it be a 2wd runs cooler?

Your torque converter is locked in this example.

Get into some towing with the converter unlocked and the temps will rise. That could be stop and go, or slow pulling in 1st and 2nd.

A couple times a year I’ll tow up a 6-7% grade at 24K GCW at 10-15 mph for 7 miles. My temps will get close to 200°.

Overall the cooling system on the trans is phenomenal.

 

[HVAC2]

Interesting. 8 or so postings above this is a picture showing i70 eastbound Cresting the rockies in cool ambient temps. You can see full cluster if you expand the picture. This was down to 3rd gear as I had a slow vehicle ahead. Is the converter locked in this situation?

 

[Cummins12V98]

converter locks 2nd thru 6th.

 

[HVAC2]

I thought only in 6th. Thank you.