68 steering column - Impala Tech
 
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post #1 of 7 (permalink) Old 03-02-2018, 11:09 AM Thread Starter
 
 
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68 steering column

My dash has D and L for a power glide, I was told that I would have to change entire column if I were to install a th 400. Is this true or is there a way to do swap without changing the column.

Dan


1968 4 dr Impala
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post #2 of 7 (permalink) Old 03-02-2018, 11:56 AM
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Originally Posted by 68impsed View Post
My dash has D and L for a power glide, I was told that I would have to change entire column if I were to install a th 400. Is this true or is there a way to do swap without changing the column.
"They" lie!

Depending upon the year you have there exist a replacement lens (the PRNDL you seek).

Here is one for a 1961-'62:

https://www.lategreatchevy.com/full-...CABEgLAyvD_BwE

One that they claim only fits a 1967:

SHIFTWORKS - Column Lens Indicators

Year One currently (their stock changes over time) only has 1961-'64 indicators lens in stock:

https://www.yearone.com/Catalog/1958...dicator-lenses

If you want to sift through the other 743,000 returns on Google just ttpe in this search term "Shift indicator lens". I'm sure some one has what you want.

Big Dave
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post #3 of 7 (permalink) Old 03-02-2018, 01:03 PM
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Also as long as everything else is set up correctly and you Don't plan on manually shifting it into 1st gear ever you can hook your linkage up so that the R will still be reverse, the N will still be neutral, and the D will be drive. The L will end up being second gear and you just will not be able to manually shift into 1st gear. This is how poor boys used to deal with the conversions back in the day.
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post #4 of 7 (permalink) Old 03-02-2018, 05:05 PM Thread Starter
 
 
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Also as long as everything else is set up correctly and you Don't plan on manually shifting it into 1st gear ever you can hook your linkage up so that the R will still be reverse, the N will still be neutral, and the D will be drive. The L will end up being second gear and you just will not be able to manually shift into 1st gear. This is how poor boys used to deal with the conversions back in the day.
Ok thanks guys for this info. How would one go about being able to manually shift into first gear without harming anything.

Dan


1968 4 dr Impala
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post #5 of 7 (permalink) Old 03-02-2018, 05:12 PM Thread Starter
 
 
Join Date: Nov 2017
Location: SE PA
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Quote:
Originally Posted by Big Dave View Post
"They" lie!

Depending upon the year you have there exist a replacement lens (the PRNDL you seek).

Here is one for a 1961-'62:

https://www.lategreatchevy.com/full-...CABEgLAyvD_BwE

One that they claim only fits a 1967:

SHIFTWORKS - Column Lens Indicators

Year One currently (their stock changes over time) only has 1961-'64 indicators lens in stock:

https://www.yearone.com/Catalog/1958...dicator-lenses

If you want to sift through the other 743,000 returns on Google just ttpe in this search term "Shift indicator lens". I'm sure some one has what you want.

Big Dave
I have the PNRDL lens currently, I will need a PNRD21 lens, but would I need a new column as well if I installed a TH400. Like I said someone told me I need to replace column.

I also read about “combs” where are these located in the vehicle? Could I just replace a comb?


Sorry for all the questions, this is my son and I first project car.
And thanks for any and all info.

Dan


1968 4 dr Impala
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post #6 of 7 (permalink) Old 03-02-2018, 05:17 PM
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Originally Posted by 68impsed View Post
Ok thanks guys for this info. How would one go about being able to manually shift into first gear without harming anything.
You have to have three detents in the shifter comb past nuetral, or you can not manually shift the transmission. There are used parts available on Flea-bay or you can buy all brand new parts on line from many restoration houses.

I agree I had the same issue with installing an overdrive automatic four speed transmission in place of a TH400 or TH350. I could shift into OD drive reverse and neutral as well as park, but never manually shift into first gear. With the high numeric rear gear I ran that fraction of a second that the tranny was in first wasn't as important as the other three gears. I just left it in "D" for drag; and modified the computer that controlled the shift points and how hard it hits between gears to get down the strip.

Big Dave
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post #7 of 7 (permalink) Old 03-03-2018, 08:13 AM
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In order to get all the gears to work and the proper lens PRND21 you will have to rebuild your steering column and find a proper detent comb that will fit in your steering column. I would call a specialist company like Shiftworks and talk with one of their technicians to see if they can tell you everything you will need to convert your column. Another option would be to talk to a shop that overhauls steering columns and see if they will sell you the parts or complete a steering column overhaul for you with the new detents.


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