DIY 03 G35 Coupe 5AT to 07 G35S 5AT differential swap
#316
#317
#320
I know a friend with a manual g37s hes getting the 4.08 gear. It should bolt right in? Even though mines an auto?
#321
Registered User
iTrader: (18)
It doesn't matter which transmission you have since all G35's have a 4-bolt flange on the front of their diffs while G37's have 2 different versions, a 3-bolt and a 4-bolt flange. That is what you need to look out for. Any OEM diff with the 4-bolt flange can be bolted on directly. The other ones would need the flange swapped out and the pinion shaft shortened.
#322
It doesn't matter which transmission you have since all G35's have a 4-bolt flange on the front of their diffs while G37's have 2 different versions, a 3-bolt and a 4-bolt flange. That is what you need to look out for. Any OEM diff with the 4-bolt flange can be bolted on directly. The other ones would need the flange swapped out and the pinion shaft shortened.
#323
So I picked up this diff in January and debated whether or not to do this mod because of the discussions on here about the cruise and my own personal concerns about gas mileage and general wear due to increased rpm. I decided a few weeks ago to go ahead and put it in thinking the worst that that could happen is I wouldn't like it and I'd have to put the original back or get a 3.5 vlsd and swap that in. For those of you that read this whole thread and still have concerns about this, don't. The only unexpected issue I experienced during the install was you have to change the collar on your old yolk to the one on the 3 bolt yolk, use a big socket to press it on. The OP tried to cover this in this diy, it just wasn't clear. My cruise works at least up to 80, I haven't tried it any higher and never use it above 80 anyways so that's not an issue. On my last tank I averaged 21.8 mpg, with the stock diff I never averaged over 21mpg, usually I was right around 19-20mpg. The rpm doesn't seem to be a factor even on the highway cruising at 80 the added 500rpm are hardly noticable in the cabin, there's no extra vibration or engine noise, time will tell but I figure if it's getting better mileage it's more efficient which in turn means it's not really working any harder This is a great mod for the 5at.
#324
I drove ttrank's car solo
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G35 sedan w/ too much money in mods
#325
It's a 3.7 vlsd, I assumed everyone would figure it was a 3.7 since it's in this diy. I did have to shorten the pinion and swap the yolk from the original diff once the collar from the 3.7 was fitted.
#326
Att!
It doesn't matter which transmission you have since all G35's have a 4-bolt flange on the front of their diffs while G37's have 2 different versions, a 3-bolt and a 4-bolt flange. That is what you need to look out for. Any OEM diff with the 4-bolt flange can be bolted on directly. The other ones would need the flange swapped out and the pinion shaft shortened.
#329
I've read so much over the last week on this install Im going crazy.
I have a 03.5 G35S AT5 with the factory diff 3.3 with a 4 bolt flange. So I need to go to a 08-09 MT Sedan Pumpkin that has the 4 bolt flange and no extra Moda need to be done correct? To do this install I will be traveling 30 miles to a friend's house on my off day (He has the tools/skills) and all is well. The only issue would be using my old abs sensor rather than the ones in the new pumpkin. There are so many different info DIY on this swap. The guys who had to swap yolks, shorten pinion shafts are coupe guys or non 03 sedan guys correct. Im pulling the plug on a Pumpkin to do this install September 26th so I need to know. If an extra part is needed I gotta pray dabbing can be done or my car will be stuck 30 miles away from home.
I have a 03.5 G35S AT5 with the factory diff 3.3 with a 4 bolt flange. So I need to go to a 08-09 MT Sedan Pumpkin that has the 4 bolt flange and no extra Moda need to be done correct? To do this install I will be traveling 30 miles to a friend's house on my off day (He has the tools/skills) and all is well. The only issue would be using my old abs sensor rather than the ones in the new pumpkin. There are so many different info DIY on this swap. The guys who had to swap yolks, shorten pinion shafts are coupe guys or non 03 sedan guys correct. Im pulling the plug on a Pumpkin to do this install September 26th so I need to know. If an extra part is needed I gotta pray dabbing can be done or my car will be stuck 30 miles away from home.
#330
I've read so much over the last week on this install Im going crazy.
I have a 03.5 G35S AT5 with the factory diff 3.3 with a 4 bolt flange. So I need to go to a 08-09 MT Sedan Pumpkin that has the 4 bolt flange and no extra Moda need to be done correct? To do this install I will be traveling 30 miles to a friend's house on my off day (He has the tools/skills) and all is well. The only issue would be using my old abs sensor rather than the ones in the new pumpkin. There are so many different info DIY on this swap. The guys who had to swap yolks, shorten pinion shafts are coupe guys or non 03 sedan guys correct. Im pulling the plug on a Pumpkin to do this install September 26th so I need to know. If an extra part is needed I gotta pray dabbing can be done or my car will be stuck 30 miles away from home.
I have a 03.5 G35S AT5 with the factory diff 3.3 with a 4 bolt flange. So I need to go to a 08-09 MT Sedan Pumpkin that has the 4 bolt flange and no extra Moda need to be done correct? To do this install I will be traveling 30 miles to a friend's house on my off day (He has the tools/skills) and all is well. The only issue would be using my old abs sensor rather than the ones in the new pumpkin. There are so many different info DIY on this swap. The guys who had to swap yolks, shorten pinion shafts are coupe guys or non 03 sedan guys correct. Im pulling the plug on a Pumpkin to do this install September 26th so I need to know. If an extra part is needed I gotta pray dabbing can be done or my car will be stuck 30 miles away from home.