Stuck in 1st gear..

[Tano]

I've got an 01 lb7 CCSB 4x4
Yesterday my truck ran fine. Parked in the driveway then this morning I get to goto work and it won't shift out of first. This morning we got a cold spell so it's about 50 degrees this morning. I checked tranny fluid and its full. What should I do?

 

[paint94979]

have you limped the stock trans a lot? i just went through this with my built trans, my internal filter was clogged from so much clutch material. you like me may be due for a trans build

 

[MACKIN]

How old or have you changed the NSBU? (neutral safety switch)

 

[Tano]

I've never limped it that I know of. Anytime I've raced or got on it it has shifted nicely. I don't understand how it all of a sudden is not shifting.

 

[Tano]

How old or have you changed the NSBU? (neutral safety switch)

I honestly don't know what that is. I got the truck at 133k miles and now it has 139k

 

[paint94979]

neutral safety backup switch... i thought my issue was that so i changed it out.

 

[Tano]

Sad sight

 

[Tano]

Sad sight

Why do my pictures show up sideways when i upload from my phone? ha

 

[MACKIN]

Its located on the driverside on the transmission . The shift cable is connected to it look and see what color the switch is. If I recall you want a black one that is the newest not to say that the black ones go bad over time from moisture.

Or is it tan? Man I cannot recall which one is the newest.

Sorry somebody will correct me

 

[Tano]

Its located on the driverside on the transmission . The shift cable is connected to it look and see what color the switch is. If I recall you want a black one that is the newest not to say that the black ones go bad over time from moisture.

Or is it tan? Man I cannot recall which one is the newest.

Sorry somebody will correct me

No probs, thanks for the info.
I just dropped it off at the Trans shop in town that everyone says is the best.
Good thing is the company I work for is taking care of it

I'll keep yall updated on what they say

 

[Tano]

Oh and it's an Allison btw.

 

[paint94979]

We figured

 

[Chevy1925]

Its located on the driverside on the transmission . The shift cable is connected to it look and see what color the switch is. If I recall you want a black one that is the newest not to say that the black ones go bad over time from moisture.

Or is it tan? Man I cannot recall which one is the newest.

Sorry somebody will correct me

tan is the newest one

 

[Mile_high]

The nsbu is a quick change.

Mine was damaged by road debris (tree branch/small log...) and wouldn't shift out of first. After driving to Napa at about 2 and a half grand in first gear, I found the little arm wasn't making contact with that swath inside.

That was the most expensive nss I've ever purchased. I got one for the 1/2 ton last year for like 12 bones...IIRC, the Allison one was about $100.

 

[Mile_high]

tan is the newest one

Last week repair checking in...Can confirm. :thumb:

 

[Tano]

So I'm guessing because there was no slippage or any other signs of tranny failure it's more than likely going to be something simple/inexpensive?

 

[MACKIN]

I would have checked the NSBU like I suggested first and probably changed it out easy and cheap part at a Allison dealer.

 

[MACKIN]

tan is the newest one

Tanks buddy! :thumb:

 

[Tano]

Called it.
Neutral safety switch. Picking it up now

 

[Tano]

Thanks guys.