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Old 02-08-2024, 02:25 PM   #4
rack
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Join Date: Dec 2012
Location: Sofia, Bulgaria
Posts: 28
Re: 1990 Suburban 4x4, TH400 to 4L80e swap

Hi Hawkynz,

Thanks a lot for the useful info. If you have thread about your swap, let me know to follow it.

I might follow your advice and next week I will go to inspect the transmission that is here in Bulgaria.

I have some more questions.

Do I need neutral safety switch at the trans, or I would use the one in the steering column (I guess it is there)?

Since my truck originally came with three speed auto, do I need to change anything in the steering column or it will shift 4 speed auto as well?

I am not native English speaker, so, please point me what is the name of the part that shows which gear is engaged on the dash?
The one with the red arrow and PRND21. I have seen this with D in circle and 321. I would like to buy and install one of these when I do the swap.

Thanks a lot for the help!

Ivo
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2004 Chevy Monte Carlo SS Supercharged
1990 Chevy Suburban 350 TBI
1978 Chevy Monte Carlo 305,2bbl
1997 Hyundai Accent 1,3
1985 Trabant 601s 2-stork 600 ccm
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