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Tunatime

Hi / low problem

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Hi all have a problem with my discovery it's a 93 v8 3.5 efi. So the diff lock works makes a good clunk when I move left to right vice versa and light comes on on the dash but when I push the shifter fwd nothing engages I have looked underneath and all linkages are free and moving shaft to top of transfer case is moving in sync but no clunk or noise to indicate a solid engagement. Do I have a eternal transfer case problem?  Any help would be appreciated.

Cheers

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When you push it forwards can you get drive? Do you move forwards in low range?

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Yup still get drive but seems to be going at the same speed as high box I will double check that this afternoon but it does have drive

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On the top of the transfer box is a short rectangular housing held down with 6 bolts, the high/low selector arm enters through the end of the housing and a little finger pushes the selector inside the transfer box to shift ratios.  If you remove that housing, inside is a grub screw that often comes loose, attaching the selector "finger" to the selector rod.  The result of which is that everything looks like it is moving properly externally but nothing happens inside the transfer box when you go to shift.

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On 10/15/2018 at 8:45 PM, Tunatime said:

Yup still get drive but seems to be going at the same speed as high box I will double check that this afternoon but it does have drive

Have you tried taking it down the road up to some speed? With an autobox, it can seem deceptively fast crawling in low, but you'll notice it once the box shifts up. Not questioning you, but I've seen it happen, setting of with a heavy trailer, wondering why the box wouldn't shift to 3rd once on open road. In fact it was still in low (4th) from maneuvering... 

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Have just taken  the top of the transfer case off and yes the grub screw was completely gone will fish around with a magnet to try get it but I doubt that I will thanks for the help much appreciated.

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