2004R install in late C3

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Oct 22, 2023 | 07:57 PM

#21

Bikespace

Race Director

Joined: Mar 2017

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From: Virginia

Quote:

Originally Posted by MattoonVette

I am running a 4L60E in my 81 using the G-Force crossmember. You can run true dual exhaust system but you do have to run it down the passengers side under the seat. Here is how I did mine. There is enough room to run it through the crossmember and make the turn before getting to the drivers side floor pan.

Clever!

But an 80 like the OP's wouldn't have the large bump to clear a power seat, would it? Mine doesn't.

The power seat option had a 72% take rate in 81, and likely all floor pans were sized for them. But it was not an option in 1980, AFAIK.

Oct 22, 2023 | 08:00 PM

#22

MattoonVette

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Quote:

Originally Posted by Bikespace

You are correct on the 80 not having the lowered floor pan. The 81-82 had the same lowered floor pan whether it had the power seat or not. I have had two 81's, one with a power seat and one with a manual seat. Same floor pan but used a different set of manual seat brackets than the 80.

Oct 22, 2023 | 09:05 PM

#23

Golfobsessed

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From: Arizona

Thanks guys... just got the email that crossmember is no longer available

Oct 22, 2023 | 09:18 PM

#24

gjohnson

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From: Denver CO

Quote:

Originally Posted by Golfobsessed

Thanks guys... just got the email that crossmember is no longer available

Check out www.bowtieoverdrives.com. Its where I got mine,also has e brake

Oct 22, 2023 | 09:22 PM

#25

Golfobsessed

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From: Arizona

Quote:

Originally Posted by gjohnson

Check out www.bowtieoverdrives.com. Its where I got mine

Thank you, they do have one but it doesn't have the attachment for the parking brake, might have to buy one and fabricate the bracket, doesnt look very stout by the photo

Oct 22, 2023 | 09:27 PM

#26

Golfobsessed

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From: Arizona

Quote:

Originally Posted by gjohnson

Check out www.bowtieoverdrives.com. Its where I got mine,also has e brake

yep, I was just replying thank you again, at closer look from your link I can see the bracket, will order one in the morning, thank you.

Oct 22, 2023 | 09:29 PM

#27

MattoonVette

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Go directly to the G-Force site. They can help you out.
https://www.crossmembers.com/collect..._C3%20Corvette

Oct 22, 2023 | 09:32 PM

#28

Golfobsessed

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From: Arizona

Quote:

Originally Posted by MattoonVette

Go directly to the G-Force site. They can help you out.
https://www.crossmembers.com/collect..._C3%20Corvette

I did actually email them a few minutes ago but according to Vivid the manufacturer isnt producing it nor taking any future orders, i will see how they respond to my email and keep posted but looks like I can get one from Bowtie if not... I will fabricate if needed

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Oct 22, 2023 | 09:33 PM

#29

MattoonVette

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Quote:

Originally Posted by Golfobsessed

Dang that isn't good. Let us know what you find out.

Oct 22, 2023 | 09:34 PM

#30

Golfobsessed

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From: Arizona

Quote:

Originally Posted by MattoonVette

Dang that isn't good. Let us know what you find out.

I will give an update tomorrow after talking with Gforce

Oct 22, 2023 | 09:36 PM

#31

MattoonVette

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Quote:

Originally Posted by Golfobsessed

I will give an update tomorrow after talking with Gforce

Correct me if I am wrong but if memory serves me the 2004R using the same mounting location as the T350 right? If that is the case then try here. They show t have 2 in stock.

https://www.speedwaymotors.com/G-For...hoCA9gQAvD_BwE

Oct 22, 2023 | 09:43 PM

#32

Golfobsessed

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From: Arizona

Quote:

Originally Posted by MattoonVette

thank you... no the 2004r mounting is about 7" further back from the th350... its actually at the end of the transmission but on the 79 and earlier C3s you can remove the th350 mount bracket off the crossmember and the 2004r bolts to the bracket bolt holes on the crossmember

Oct 22, 2023 | 09:49 PM

#33

MattoonVette

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Quote:

Originally Posted by Golfobsessed

I knew the 700R4 and 4L60 was longer regarding the mounting location but thought the 2004R was the same as the T350. I looked on the G-Force website and they show the one for a T400 and 2004R are the same.

Last edited by MattoonVette; Oct 22, 2023 at 09:55 PM.

Oct 22, 2023 | 09:52 PM

#34

Golfobsessed

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From: Arizona

Quote:

Originally Posted by MattoonVette

I knew the 700R4 and 4L60 was longer regarding the mounting location but thought the 2004R was the same as the T350. Anyway, how about this one.

https://www.speedwaymotors.com/G-For...hoCNowQAvD_BwE

thank you... no this is the one I need for 2004r and th400 short tail, it appears everyone who sells Gforce is out of them, I have a backup with Bowtie overdrives

Oct 22, 2023 | 09:56 PM

#35

MattoonVette

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Quote:

Originally Posted by Golfobsessed

thank you... no this is the one I need for 2004r and th400 short tail, it appears everyone who sells Gforce is out of them, I have a backup with Bowtie overdrives

I corrected my above post and see what you are saying. Looks like they are showing backorder unless there is one floating around somewhere.

Oct 22, 2023 | 09:58 PM

#36

MattoonVette

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Monster transmission shows they have one but it is pricey....

https://www.monstertransmission.com/...0_p_12030.html

Top flight shows it is in stock but I have my doubts about that.

https://www.topflightautomotive.com/...=TH400%2F2004R

Oct 22, 2023 | 10:00 PM

#37

Golfobsessed

Thread Starter

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From: Arizona

Quote:

Originally Posted by MattoonVette

Monster transmission shows they have one but it is pricey....

https://www.monstertransmission.com/...0_p_12030.html

yep I reached out to them too but your right... they sure are proud of that one, i will know more tomorrow for sure, thanks again so much

Oct 22, 2023 | 10:17 PM

#38

carriljc

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Joined: Jan 2001

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You can see the bowtie overdrives crossmember WITH the parking brake pulley bracket at about the 3:20 mark on this video and he discusses it at the ~5:10 mark. I posted it earlier but may have gotten lost in all my babbling: You Tube

Last edited by carriljc; Oct 22, 2023 at 10:24 PM.

Oct 22, 2023 | 10:25 PM

#39

Golfobsessed

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From: Arizona

Quote:

Originally Posted by carriljc

You can see the bowtie overdrives crossmember WITH the parking brake pulley bracket at about the 3:20 mark on this video. I posted it earlier but may have gotten lost in all my babbling: https://www.youtube.com/watch?v=J7ybQjVmEOw

thank you, from all the prior pics ive seen of the Bowtie crossmember i couldnt see the bracket but now I do, will get the skinny on my Gforce order tomorrow morning and if truly unavailable which appears the case I'm ordering the Bowtie crossmember... thats a beautiful build

Oct 22, 2023 | 11:42 PM

#40

carriljc

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Yeah. I found that video when I was looking to see if I could adapt a cross-member with pass-under exhaust to my manual tranny 68. I called them but they didn't have any available the day I called so I started fabricating my own......

anyway, here is a link to the bowtie folks. not sure what the difference is between the 68-79 and the 80-81.

https://www.bowtieoverdrives.com/cat...AT&CATID=YA2A7

Quote:

Originally Posted by Golfobsessed

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