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| Need some comparison information from other 45RFE owners http://www.lostjeeps.com/forum/phpBB3/viewtopic.php?f=1&t=38191 |
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| Author: | jg45 [ Fri Dec 12, 2008 10:43 pm ] |
| Post subject: | Need some comparison information from other 45RFE owners |
I am looking for comparison information from other KJ owners with the 45RFE transmission. I am trying to find out what is the normal converter lock up speed in 4th gear cruise. Mine only seems to lock up in 4th when I hit about 60 MPH. I have had the custom tire size set in the PCM/TCM (whichever they set it in). I suspect that I should be getting TC lock in 4th earlier than 60 mph. If I lock out overdrive I get it almost immediately after shifting into third. If I then click the OD button again, It shifts to 4th locks the TC and then immediately unlocks the TC. What is your experience? |
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| Author: | Jeepjeepster [ Fri Dec 12, 2008 10:54 pm ] |
| Post subject: | |
How heavy are you on the gas? From what Ive read, easy on the gas should be around 40-50mph with the 45rfe. Let others with the 45rfe post before you take my word. 
If Im heavy on the gas with my 42rle it will stay unlocked till I let up on the gas. |
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| Author: | jg45 [ Fri Dec 12, 2008 10:59 pm ] |
| Post subject: | |
This is really light on the gas. Even steady cruise won't lock until I hit 60. |
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| Author: | tjkj2002 [ Sat Dec 13, 2008 12:21 am ] |
| Post subject: | |
My 45RFE won't lock until 40mph in 4th gear(OD). |
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| Author: | sleeve84028 [ Sat Dec 13, 2008 12:45 am ] |
| Post subject: | |
I'd say around 40 / 45 MPH as well... |
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| Author: | jg45 [ Sat Dec 13, 2008 12:58 am ] |
| Post subject: | |
Is it a very noticeable lock up, similar to a gear change? |
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| Author: | jg45 [ Sat Dec 13, 2008 11:14 am ] |
| Post subject: | |
If mine is not locking in OD until 60, but is locking in 3rd just after the shift, what could be causing this? |
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| Author: | jdumont [ Mon Dec 15, 2008 1:22 pm ] |
| Post subject: | |
My OD has always locked in at 63-64 mph. For best highway mileage i usually get up to 65mph then settle back down to 60-62. I dont think it unlocks till around 55 or so. |
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| Author: | jg45 [ Mon Dec 15, 2008 1:31 pm ] |
| Post subject: | |
Thanks for the response. That seems to be what mine is doing. I would like to get a more solid OD converter lock at around 40-45 MPH for round town driving. I think it would really improve mileage. |
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| Author: | KY Liberty [ Mon Dec 15, 2008 4:53 pm ] |
| Post subject: | |
Talk to Wayne at APS Precision. He can get you an upgraded torque converter and a reprogramming kit that will make you very happy with the 45RFE. |
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| Author: | KJTom [ Fri Dec 19, 2008 12:42 pm ] |
| Post subject: | |
TCC lockup at about 60 - 61 MPH is normal for the 45RFE. This is of course, under light throttle. The 42RLE (and most other autos) tend to lock up around 40 MPH. |
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| Author: | jg45 [ Fri Dec 19, 2008 1:04 pm ] |
| Post subject: | |
Thanks for all of the help. Glad to hear that it is normal. I really didn't want to pay the stealership another $100 to check it out. |
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| Author: | jdumont [ Mon Dec 22, 2008 8:53 am ] |
| Post subject: | |
That's what we're here for! |
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