Crawling in Lo-Lo - non-lockup converter

["Mad Max"]

Please forgive the musical threads...



Ah'rite - Been searching the threads but haven't found a good testimonial regarding 1st gen 'manners' when off-roading. I posted this thread in the off-roading section as well.



Here's the project: '78 RC, 518, 203/205 doubler. Being built for camping, hauling the ATV's, and occasional rock crawling at Moab, etc.



I like the 518 because it's nice and simple. I like the 47RH because it has a lock-up converter and can be combined with an exhaust brake for 'slowing down the load'.



What I can't determine, is what kind of 'manners' a 12V will have with a 518 when in Lo-Lo crawling around. 'Going' isn't the problem - it's the 'woahing' I'm curious about.



With a gasser, ya get decent engine braking.

With a Cummins, ya don't.



Will it really matter??? I'd love to hear some testimonials from y'all out there in 1st gen land with 518's or 727's who off-road a lot.

Do you wish you had a lock-up transmission and an exhaust brake?



I hope I'm making too much of a big deal about it, but I'm going back and forth between using the 518 transmission I have now or finding a 47RH



This is my quanrdy - please lemme hear your thoughts.



Many, many thanks,

- Sam

 

[cerberusiam]

At low speeds an EB is not going to do much good, not enough exhaust flow. A lockup TC will obviously help quite a bit if you can keep it locked.



Low range and locked up, yeah that should give some pretty good drag on a down slope.

 

[WJones]

what do you plan for the axle ratio and tire size?