Shifting from 4Hi to 4Lo - JeepForum.com
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post #1 of 8 Old 10-22-2021, 01:20 AM Thread Starter
Zigpeters
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Shifting from 4Hi to 4Lo

The process I use to shift the transfer case selector from 4 Hi to 4 Lo in my 2000 GC 4.7l with Quadra Trac II is to get rolling to around 2-3 mph, put transmission in N and pull transfer case shifter into 4 lo firmly and with steady pressure. I don't pause at the neutral position.

4 Lo to 4 Hi is similar; get rolling around 2-3 mph, put transmission in N and push the transfer case shifter into 4 Hi firmly with steady pressure. Again, I don't pause at the neutral position.

This technique most often results in a gear crunching sound, similar to shifting a manual transmission without fully depressing the clutch.

Am I doing something wrong, or is the crunching sound "normal " to shifting?

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post #2 of 8 Old 10-22-2021, 03:25 AM
xcaliber81
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I dont ever use 4 low but I've always shut the engine off sometimes I gotta put it in N before it'll go in. I highly doubt anyone but me ever shifted my jeep out of awd.
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post #3 of 8 Old 10-22-2021, 05:33 AM
mak_v8
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That is the procedure described in manuals; I usually, if the situation of course allows it, shift from Hi to Low and from Low to Hi with the jeep stopped ahd the transmission in N
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Grand Cherokee WJ 4.7 V8 HO. m.y. 2002
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post #4 of 8 Old 10-22-2021, 07:42 AM
Mr. Bitey
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Quote:
Originally Posted by mak_v8 View Post
That is the procedure described in manuals; I usually, if the situation of course allows it, shift from Hi to Low and from Low to Hi with the jeep stopped ahd the transmission in N
Ditto. Manual say 2-3mph, but I've always come to a complete stop. Trans in neutral, then shift TC. The gears don't always mesh perfect (might be due to my mileage and wear - not sure if a fresh TC does that), so I am in the habit of a pretty firm tug/pull on the TC shifter, depending on which direction I am shifting.

2004 WJ 4.7 N, daily driver
1967 Jeep J100 panel truck (a-rusted development)
1970 'Cuda, 340 4bbl (10.952et @ 123mph)
1972 Dart Swinger, Gen III 6.4l Hemi (11.223 @ 113mph)
1974 AMC Gremlin X, 440 6bbl (sold)
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post #5 of 8 Old 10-22-2021, 07:53 AM
cDee63
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A slow roll, with a firm steady pull on the lever. Stopping is fine as well however sometimes the gear teeth are in line with each other and that will not allow the shift to happen, slow rolling lets them mesh.

2004 Limited, 4.7 modded slightly, IRO 3" RockLink LA front, adjustable SA rear, Bilsteins, Addco bar, JKS disconnects. Coming attractions include 242hd, IRO SYE and Woods DS right after the new engine/trans..
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post #6 of 8 Old 10-22-2021, 08:43 PM Thread Starter
Zigpeters
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Thanks folks for all your responses. However, I'd still like to know if others, following the instructions in the manual by shifting at 2-3 mph, experience a crunching sound, especially going into 4 Hi. I am trying to figure out if the crunching sound is "normal" or if there is a problem with my TC.

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post #7 of 8 Old 10-23-2021, 04:52 AM
mak_v8
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The crunching sound is normal, there are no synchros that help engagement between gears; it's like engaging reverse with a manual transmission while the car is slightly moving.
Your Tcase is like all WJ's TCase

Grand Cherokee WJ 4.7 V8 HO. m.y. 2002

Last edited by mak_v8; 10-23-2021 at 02:00 PM. Reason: Typing error
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post #8 of 8 Old 10-23-2021, 07:34 AM Thread Starter
Zigpeters
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[QUOTE=mak_v8;41378249] it'like engaging reverse with a manual transmission while the car is slightly moving.

Thanks mak_v8. Your analogy above is exactly what it sounds like. Good to know it is "normal ".

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