Ford C4 2.75 low gear?

fordteacherguy · 02-17-2013, 09:56 PM

Here are some pics of my ATI C-4 2.92 planetary kit. Bought through Jegs w/NHRA discount. Looks like ATI press a spline adapter in the carrier adapting the GM internal spline to a C-4 output spline then welding the adapter in place. Not crazy about the weld being right in the middle of the support bushing. Will probably fix that before install. The sun gear is hard to see what they did. You would have to weld or spline the C-4 sun gear to the larger front planetary sun gear. As for the front ring gear assy, it looks likes maybe they counterbored the ring gear assy for the torrington and added a bushing? The assembly came with GM frictions to make it compatible with my forward clutch.

A very differnent approach than my broader stuff. He stayed mainly with Ford C-4 components and mated them to the GM planetary and ring gear. The ATI stuff looked a little less "robust" than my Broader so I am sticking that stuff in my stocker and my Broader stuff in my SS.

428tom · 02-18-2013, 02:20 PM

Are you talking about Broader Performance in Texas ?

fordteacherguy · 02-18-2013, 08:01 PM

Tom,

Yep, Broader Performance Weatherford TX is where I got my first 2.92 set up.
Thought it was done well. Held up in my stocker but the forward planetary showed some wear after 4 long years of running with my #3640 stocker. Go figure!

I looked for a 2.75 but didn't find any. Now that I know Virginia Speed makes one and Pro Trans, I might give either one of them a call if I go in that direction.

Great to get fresh info through this forum. Thanks guys!

fordteacherguy · 02-27-2013, 09:22 AM

Tom,

You have a PM.

Brian

TOP GUN · 02-27-2013, 09:51 AM

i went faster with the 2.92 gearset with my smaller motor but had to weld the adaper spline on both ends (TRICKY but VSRC can do it) didnt break it any more . the littlle gears should be checked yearly. those gear axels got welded to. his 2.75 part will last longer.. check out VSRC web site

428tom · 02-27-2013, 05:43 PM

I didn't get the PM ,you can send it again or my email is 428tom@live.ca thanks Tommy

1347 · 03-09-2013, 10:20 AM

ordered one from virginia speed, he told me 2 to 3 weeks, I can post pics when i get it if anyone would like.

Duane

fordteacherguy · 03-10-2013, 10:41 AM

I would like to see pics of how Virginia Speed does it too. I'll look forward to your pics.

02-17-2013, 09:56 PM	#1
fordteacherguy Member Join Date: Jun 2007 Location: Federal Way, WA Posts: 239 Likes: 38 Liked 160 Times in 51 Posts	Re: Ford C4 2.75 low gear? Here are some pics of my ATI C-4 2.92 planetary kit. Bought through Jegs w/NHRA discount. Looks like ATI press a spline adapter in the carrier adapting the GM internal spline to a C-4 output spline then welding the adapter in place. Not crazy about the weld being right in the middle of the support bushing. Will probably fix that before install. The sun gear is hard to see what they did. You would have to weld or spline the C-4 sun gear to the larger front planetary sun gear. As for the front ring gear assy, it looks likes maybe they counterbored the ring gear assy for the torrington and added a bushing? The assembly came with GM frictions to make it compatible with my forward clutch. A very differnent approach than my broader stuff. He stayed mainly with Ford C-4 components and mated them to the GM planetary and ring gear. The ATI stuff looked a little less "robust" than my Broader so I am sticking that stuff in my stocker and my Broader stuff in my SS. Attached Thumbnails

02-18-2013, 02:20 PM	#2
428tom Junior Member Join Date: Aug 2010 Posts: 54 Likes: 0 Liked 3 Times in 3 Posts	Re: Ford C4 2.75 low gear? Are you talking about Broader Performance in Texas ?

02-27-2013, 09:22 AM	#4
fordteacherguy Member Join Date: Jun 2007 Location: Federal Way, WA Posts: 239 Likes: 38 Liked 160 Times in 51 Posts	Re: Ford C4 2.75 low gear? Tom, You have a PM. Brian

02-27-2013, 09:51 AM	#5
TOP GUN Member Join Date: Dec 2004 Location: wake forest , n.c. Posts: 162 Likes: 2 Liked 0 Times in 0 Posts	Re: Ford C4 2.75 low gear? i went faster with the 2.92 gearset with my smaller motor but had to weld the adaper spline on both ends (TRICKY but VSRC can do it) didnt break it any more . the littlle gears should be checked yearly. those gear axels got welded to. his 2.75 part will last longer.. check out VSRC web site __________________ nitro joes TOP GUN 3 years straight mark young

02-27-2013, 05:43 PM	#6
428tom Junior Member Join Date: Aug 2010 Posts: 54 Likes: 0 Liked 3 Times in 3 Posts	Re: Ford C4 2.75 low gear? I didn't get the PM ,you can send it again or my email is 428tom@live.ca thanks Tommy

02-18-2013, 08:01 PM	#3
fordteacherguy Member Join Date: Jun 2007 Location: Federal Way, WA Posts: 239 Likes: 38 Liked 160 Times in 51 Posts	Re: Ford C4 2.75 low gear? Tom, Yep, Broader Performance Weatherford TX is where I got my first 2.92 set up. Thought it was done well. Held up in my stocker but the forward planetary showed some wear after 4 long years of running with my #3640 stocker. Go figure! I looked for a 2.75 but didn't find any. Now that I know Virginia Speed makes one and Pro Trans, I might give either one of them a call if I go in that direction. Great to get fresh info through this forum. Thanks guys!

03-09-2013, 10:20 AM	#7
1347 Senior Member Join Date: Aug 2007 Location: Monroe Twp NJ Posts: 516 Likes: 1,059 Liked 1,032 Times in 283 Posts	Re: Ford C4 2.75 low gear? ordered one from virginia speed, he told me 2 to 3 weeks, I can post pics when i get it if anyone would like. Duane

03-10-2013, 10:41 AM	#8
fordteacherguy Member Join Date: Jun 2007 Location: Federal Way, WA Posts: 239 Likes: 38 Liked 160 Times in 51 Posts	Re: Ford C4 2.75 low gear? I would like to see pics of how Virginia Speed does it too. I'll look forward to your pics.

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