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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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| | | Joined: Sep 2018 Posts: 86 'Bolter | | 'Bolter Joined: Sep 2018 Posts: 86 | The top half of the diaphragm pulls up on the diff shift mechanism for high speed.
The bottom half of the diaphragm pulls the diff shift mechanism back down for low speed.
This explains why people say to put the diff back in low speed when parked. Because if the shift rod drops out of high speed due to gravity and bumping around when loading the truck it could end up in neutral and you might find your truck at the bottom of a hill. | | |
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