Pulling Forum - what gear do you like to use?

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what gear do you like to use?

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Category: Other Topics
Forum Name: Pulling Forum
Forum Description: Forum dedicated to Tractor and Garden Pulling
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=61761
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Topic: what gear do you like to use?

Posted By: alan-nj
Subject: what gear do you like to use?
Date Posted: 18 Dec 2012 at 7:16pm

particularly those of you pulling wc's and wd's. out here most of our pulls are limited to 3 or 3.5 mph with an occasional 4mph pull. many pulls require first gear only, so there's no decision to be made. but when you have a choice, are you better off pulling in a higher gear and trying to build momentum, or are you better off in a lower gear so you may have more power at the end? on the one hand, i would think the best bet would be to pull in the highest gear that you have the power for, but conversely i've had some luck with my wc pulling it in low gear , so that i can really lug it down and maintain traction.....if i have to keep the rpms up i'll frequently start to spin it, but by lugging it down i've got a chance to get a bite and keep on going.

also, if you are on a track and sled for the first time, you may not know how your unit will respond....better off to play it safe and use low gear, or gamble with a higher gear??....problem of course is that there are no 'do overs' so you're stuck with your decision....

just wondering what you like to do??

Replies:

Posted By: Gary in da UP
Date Posted: 18 Dec 2012 at 7:38pm

My WD45 always in 2nd, The D17 in 2nd on the low side. Neither could get much throttle until down the track a way with 3.5 mph limit. 1st gear would have too much spinnage at the end , still spun as it was......

Posted By: Ken(MI)
Date Posted: 18 Dec 2012 at 8:18pm

I usually pull my WC in third gear for 4 mph and under, and fourth for faster classes because using fourth reduces the lost power of driving through a gear train if you can go fast enough to use it, but my WC may not be geared quite like most others out there. A stock geared WC does best in first and second depending on the track, the engine, and the tire size you have.

Posted By: Butch(OH)
Date Posted: 18 Dec 2012 at 8:22pm

Ken aint BSen about the gears neither. I have seen em

Posted By: wi50
Date Posted: 18 Dec 2012 at 11:09pm

Write these down and put them in your tool box for future refrence. Here's the stock gear ratios for a WD45 and a WC. Ratios shown are final gear ratios, meaning turns of the crankshaft to turns of the rear axil (with no clutches slipping)

1st=67 to 1

2nd=46 to 1

3rd=35 to 1

4th=18.5 to 1

WD45

1st=84 to 1

2nd=52.5 to 1

3rd=40 to 1

4th=18 to 1

I don't have the gear ratios of the ring and pinion for each, and RC, D-17 or WD45 diesel handy in front of me but with them a guy could figure what the gears would be with changeing the ring and pinion.

I think a WC is 4.40 to 1 and an RC is 6.67 to 1, but that's just going from memory. A little reverse math and one can get what the gear ratios would be when swapped.

It's nice to know so when you see someone go in a certain gear, you can base your decision on it.

A lot of times on a 3 or 4 mph pace it's good to put the engine to sleep a little. To low of a gear and the tires break loose to easy. There was a d-17 diesel that managed top finishes against tractors with big power and it (the -17) probably didn't have 50 hp on the dyno. Drug out of the brush and went pulling, it just kept dying down and the tires would stay hooked.

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"see what happens when you have no practical experience doing something...... you end up playing with calculators and looking stupid on the internet"

Posted By: Larry(OH)
Date Posted: 19 Dec 2012 at 5:15am

The WC ratio's look right to me..Now mine is around 7.2-1 The rear end is from a speed patrol. The fellow I bought it from has a rear end with the "picker" gear (6.6-1) in it that his dad bought from AC and put in there tractor laying there and there was a difference in it and the Patrol gearing when we checked it out. This was with the old count the pinion to hub revs.

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'40 WC puller,'50 WD puller,'50 M puller '65 770 Ollie

*ALLIS EXPRESS contact*

I can explain it to you, BUT I cannot understand it for you!!

Posted By: mattb
Date Posted: 19 Dec 2012 at 10:48am

I have a wd with a 45diesel rearend in it run in 2nd up to 4000 then in first after that usually do better in first. Helped a couple buddys build a wd with the handclutch assy removed and a wc trans in front of the wd trans run front tranny in 3rd back one in 2nd for 3mph and back one in 3rd is 4mph cheap and easy to do. Usap said it was ok to run in farm stock.

Posted By: mattb
Date Posted: 19 Dec 2012 at 10:49am

these speeds are all with 15.5 by 38s