ford 8.8 options
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Laughing Gas
Joined: Dec 2010
Posts: 924
Likes: 1
ford 8.8 options
Okay so I have a stock 3.08 gears looking for maybe a LS setup could some tell me what would be the correct gear for my setup on my truck.
i have a 1986 Ford f150, Ford 300 i6 4.9L .20 over bore, p&p head, Crower 19212 cam, crower lifter spring kit, cloyes timing gears, Offy DP intake, hedman header, Holley 600 CFM carb, polished crank, milled head (just enough to resurface it), 3 angle valve job, and I have a top loader trans in it if that has anything to do with it.
Summit has this nice combo for a fair price but i dont want it to be the wrong gearing. My truck doesnt haul things very often but we do use it to do what it was built for when we do, I also take to Car show from time to time.
Summit Racing® Ring and Pinion and Differential Pro Packs 14-0063 - SummitRacing.com
gotta go to school now thanks in advance guys and gals!
i have a 1986 Ford f150, Ford 300 i6 4.9L .20 over bore, p&p head, Crower 19212 cam, crower lifter spring kit, cloyes timing gears, Offy DP intake, hedman header, Holley 600 CFM carb, polished crank, milled head (just enough to resurface it), 3 angle valve job, and I have a top loader trans in it if that has anything to do with it.
Summit has this nice combo for a fair price but i dont want it to be the wrong gearing. My truck doesnt haul things very often but we do use it to do what it was built for when we do, I also take to Car show from time to time.
Summit Racing® Ring and Pinion and Differential Pro Packs 14-0063 - SummitRacing.com
gotta go to school now thanks in advance guys and gals!
Fleet Mechanic
Joined: Jul 2011
Posts: 1,916
Likes: 4
Your truck more than likely has the New Process 4-speed with the granny 1st gear. This means that you can get away with a little taller rear-end gearing to keep your cruising RPMs down for decent mileage, but use the 1st gear for starting off without struggling.
Put in a set of 3.27 or maybe (if you don't do too much highway driving) a set of 3.55 gears in the rear like you've picked out. This will give your truck a LOT more pep off the line, as well as help it tow even easier with your beefed up 300. You'll really like a limited slip, particularly if you do a lot of starting/stopping on hills with loads. What size tires are you running? Also, if you swap out gears and tire sizes, your speedometer is going to be off. So, this means you're probably going to be changing the speedometer gear to get the gauge reading the correct speed again.
Put in a set of 3.27 or maybe (if you don't do too much highway driving) a set of 3.55 gears in the rear like you've picked out. This will give your truck a LOT more pep off the line, as well as help it tow even easier with your beefed up 300. You'll really like a limited slip, particularly if you do a lot of starting/stopping on hills with loads. What size tires are you running? Also, if you swap out gears and tire sizes, your speedometer is going to be off. So, this means you're probably going to be changing the speedometer gear to get the gauge reading the correct speed again.
More Turbo
Joined: Oct 2009
Posts: 731
Likes: 6
From: Jonesborough, TN
I had pretty much the same setup in my truck when I started my project, except I had 3.55 rear end gears. I swapped the engine and will also swap out the trans, but will stick with an overdrive unit. Do you have an overdrive trans? If you do, check your speed vs RPMs and then use a gear ratio calculator to determine the overdrive ratio. Using that data, you can use the gear ratio calculator to determine what your RPM's for a given speed. Then pick one that will work for you. Keep in mind the 300-6 has a good amount of torque but is not high revving, so cruising at 1800-2200 would be a good number to shoot for. Just my opinion. Good luck with your project.
More Turbo
Joined: Oct 2009
Posts: 731
Likes: 6
From: Jonesborough, TN
Just struck me, too. When replacing your pinion gear, I highly recommend a crush sleeve eliminator kit, such as the Richmond Gear 04-0011-S at Richmond Gear Pinion Bearing Spacer and Shim Kits 04-0011-S - SummitRacing.com
Setup bearings will also be essential so you don't have to constantly press off and on the bearings on the pinion to get your pattern correct. But trust me, that crush sleeve eliminator or pinion spacer is worth every penny of the $12 you'll pay for it.
Setup bearings will also be essential so you don't have to constantly press off and on the bearings on the pinion to get your pattern correct. But trust me, that crush sleeve eliminator or pinion spacer is worth every penny of the $12 you'll pay for it.
Thread Starter
|
Laughing Gas
Joined: Dec 2010
Posts: 924
Likes: 1
Your truck more than likely has the New Process 4-speed with the granny 1st gear. This means that you can get away with a little taller rear-end gearing to keep your cruising RPMs down for decent mileage, but use the 1st gear for starting off without struggling.
Put in a set of 3.27 or maybe (if you don't do too much highway driving) a set of 3.55 gears in the rear like you've picked out. This will give your truck a LOT more pep off the line, as well as help it tow even easier with your beefed up 300. You'll really like a limited slip, particularly if you do a lot of starting/stopping on hills with loads. What size tires are you running? Also, if you swap out gears and tire sizes, your speedometer is going to be off. So, this means you're probably going to be changing the speedometer gear to get the gauge reading the correct speed again.
Put in a set of 3.27 or maybe (if you don't do too much highway driving) a set of 3.55 gears in the rear like you've picked out. This will give your truck a LOT more pep off the line, as well as help it tow even easier with your beefed up 300. You'll really like a limited slip, particularly if you do a lot of starting/stopping on hills with loads. What size tires are you running? Also, if you swap out gears and tire sizes, your speedometer is going to be off. So, this means you're probably going to be changing the speedometer gear to get the gauge reading the correct speed again.
about the speedometer thanks ill keep that in mind.
I had pretty much the same setup in my truck when I started my project, except I had 3.55 rear end gears. I swapped the engine and will also swap out the trans, but will stick with an overdrive unit. Do you have an overdrive trans? If you do, check your speed vs RPMs and then use a gear ratio calculator to determine the overdrive ratio. Using that data, you can use the gear ratio calculator to determine what your RPM's for a given speed. Then pick one that will work for you. Keep in mind the 300-6 has a good amount of torque but is not high revving, so cruising at 1800-2200 would be a good number to shoot for. Just my opinion. Good luck with your project.
Just struck me, too. When replacing your pinion gear, I highly recommend a crush sleeve eliminator kit, such as the Richmond Gear 04-0011-S at Richmond Gear Pinion Bearing Spacer and Shim Kits 04-0011-S - SummitRacing.com
Setup bearings will also be essential so you don't have to constantly press off and on the bearings on the pinion to get your pattern correct. But trust me, that crush sleeve eliminator or pinion spacer is worth every penny of the $12 you'll pay for it.
Setup bearings will also be essential so you don't have to constantly press off and on the bearings on the pinion to get your pattern correct. But trust me, that crush sleeve eliminator or pinion spacer is worth every penny of the $12 you'll pay for it.
I wont be doing the swap till next year i gotta save currently my pickup isn't my daily driver anymore...
cheers guys thank you for the input!
More Turbo
Joined: Oct 2009
Posts: 731
Likes: 6
From: Jonesborough, TN
Thanks, fordboy. Nice to know someone's reading along. 
If you need any tips on rebuilding that rear end, let me know. I'm no expert, but did just rebuild mine, so I probably have dealt with the same problems you will encounter. Of course, I kept my ring and pinion, so didn't have to adjust pinion depth, backlash, and the pattern came out perfect on first check. Beginners luck, to be sure. Anyway, if I can help, holler at me.
If you need any tips on rebuilding that rear end, let me know. I'm no expert, but did just rebuild mine, so I probably have dealt with the same problems you will encounter. Of course, I kept my ring and pinion, so didn't have to adjust pinion depth, backlash, and the pattern came out perfect on first check. Beginners luck, to be sure. Anyway, if I can help, holler at me.
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