My review the 3.5 VLSD swap into a 5AT
#46
03-10-2010, 11:09 AM
Sorry to break up the CC discussion (mine still works), but I have to agree with OC that the shift firmness under moderate throttle is increased. I don't notice much difference at WOT. I guess the reason for the increased shift firmness is that line pressure is increased with rpm so deeper gears at the same given MPH as the OEM gearset will result in a little more line pressure because the rpms will be higher. A WOT throttle shift won't be any different.
The VLSD is nice and it's going to take a little getting use to. I'm glad it still works really well too since this 06 carrier had 50K miles on it already.
The VLSD is nice and it's going to take a little getting use to. I'm glad it still works really well too since this 06 carrier had 50K miles on it already.
#47
03-10-2010, 01:08 PM
#48
03-10-2010, 01:14 PM
OCG35 Are you being serious?
I'm pretty certain a rational person would read my post followed by Tollboothwilley and GT-ER simply misinterpretted my post as meaning "3.5 and higher loses CC"
For either individual to say otherwise would go against the common advice of this forum regarding differentials. And if either intended to go against this common advice, I'm sure they would have cited your car as the counterpoint. And then as a responsible member of the g35 community they would have mentioned it was the only one that it worked on so people don't try to swap a 3.7 in their 2006 or 2007 and expect CC to work.
Nonetheless, in my follow-up I did mention your case, unprovoked might I add, to avoid being corrected based on an exception to a well accepted rule.
Most importantly, however, look at the context of my highly technical 2-line post and you'll realize it did not merit putting an asterisk and a disclaimer: "man good thing cruise control doesn't work after going above 3.5 or i'd be a lot poorer. No one ever tell me if they get a fix for that. Thx! " A post of this nature was not written intended for the high level of scrutiny you subjected it to.
In conclusion, if any mods are reading this, I request my name to be changed to "TheBusDriver" because I just took you to school.
I'm pretty certain a rational person would read my post followed by Tollboothwilley and GT-ER simply misinterpretted my post as meaning "3.5 and higher loses CC"
For either individual to say otherwise would go against the common advice of this forum regarding differentials. And if either intended to go against this common advice, I'm sure they would have cited your car as the counterpoint. And then as a responsible member of the g35 community they would have mentioned it was the only one that it worked on so people don't try to swap a 3.7 in their 2006 or 2007 and expect CC to work.
Nonetheless, in my follow-up I did mention your case, unprovoked might I add, to avoid being corrected based on an exception to a well accepted rule.
Most importantly, however, look at the context of my highly technical 2-line post and you'll realize it did not merit putting an asterisk and a disclaimer: "man good thing cruise control doesn't work after going above 3.5 or i'd be a lot poorer. No one ever tell me if they get a fix for that. Thx! " A post of this nature was not written intended for the high level of scrutiny you subjected it to.
In conclusion, if any mods are reading this, I request my name to be changed to "TheBusDriver" because I just took you to school.
Mind making your point without all the rhetoric?
A post was made (twice) that higher than 3.5 loses cc (which is a bad why to state it anyway because ppl may not know what was meant by "higher" - that could be misconstrued as taller... simply stated would be "anything shorter than 3.5 loses cc").
At any rate - I did nothing more than make it clear - 3.7 doesn't lose cc... and also noted that it's not because "some lucky sob"
I have no idea what your point is though.
#49
03-10-2010, 01:33 PM
Why don't we all agree with the following:
1) If you do the 3.5 swap, you will most likely lose CC somewhere around 80mph.
2) If you do the 3.5/3.7 swap and have staggered tires where there is a height difference between front tires and rear tires, you could loose CC at a lower MPH.
3) If you do the 3.7 swap, you've got a good chance of loosing CC with a 03/04 car and will probably be okay with a 04.5+ car.
There have been reports of those loosing CC with 3.5 and 3.7 swaps. Those clearly aren't lying. There is definitely a CC issue everyone should be aware of when doing these swaps. If you want to be safe, stick with the 3.5 swap and keep your CC speeds below 75mph and you should be fine.
1) If you do the 3.5 swap, you will most likely lose CC somewhere around 80mph.
2) If you do the 3.5/3.7 swap and have staggered tires where there is a height difference between front tires and rear tires, you could loose CC at a lower MPH.
3) If you do the 3.7 swap, you've got a good chance of loosing CC with a 03/04 car and will probably be okay with a 04.5+ car.
There have been reports of those loosing CC with 3.5 and 3.7 swaps. Those clearly aren't lying. There is definitely a CC issue everyone should be aware of when doing these swaps. If you want to be safe, stick with the 3.5 swap and keep your CC speeds below 75mph and you should be fine.
#50
03-10-2010, 01:44 PM
#51
03-10-2010, 05:24 PM
#52
03-10-2010, 11:30 PM
#54
03-11-2010, 12:11 AM
So there are a variety of possibles that the 04.5 changes could contribute to...
#55
03-11-2010, 12:41 AM
Yes, thats what I meant.
3.5 swap is good to 85-86 MPH. If you pass the limit AT ANY TIME it will disable your CC until you restart the car. Works every time for me.
The 03-04 AT's have a different style TCM (TCU) and Valve Body than 04.5+ (10/2004 build date). They put the TCU inside the trans from 2004.5+ and also changed a few things. You can get TC to hold gear at a much lower RPM and have better control. Rev matching was also introduced but I think that was 06+, not sure on that.
I know that the TCU receives and sends speed signals to the ECU. I think the ECU reads and see the differences between differential and transmission speed and won't let the CC work. Maybe its to prevent gear slippage (just in case tranny is X% faster than tires)??.
Why don't we all agree with the following:
1) If you do the 3.5 swap, you will most likely lose CC somewhere around 80mph.
2) If you do the 3.5/3.7 swap and have staggered tires where there is a height difference between front tires and rear tires, you could loose CC at a lower MPH.
3) If you do the 3.7 swap, you've got a good chance of loosing CC with a 03/04 car and will probably be okay with a 04.5+ car.
There have been reports of those loosing CC with 3.5 and 3.7 swaps. Those clearly aren't lying. There is definitely a CC issue everyone should be aware of when doing these swaps. If you want to be safe, stick with the 3.5 swap and keep your CC speeds below 75mph and you should be fine.
1) If you do the 3.5 swap, you will most likely lose CC somewhere around 80mph.
2) If you do the 3.5/3.7 swap and have staggered tires where there is a height difference between front tires and rear tires, you could loose CC at a lower MPH.
3) If you do the 3.7 swap, you've got a good chance of loosing CC with a 03/04 car and will probably be okay with a 04.5+ car.
There have been reports of those loosing CC with 3.5 and 3.7 swaps. Those clearly aren't lying. There is definitely a CC issue everyone should be aware of when doing these swaps. If you want to be safe, stick with the 3.5 swap and keep your CC speeds below 75mph and you should be fine.
I know that the TCU receives and sends speed signals to the ECU. I think the ECU reads and see the differences between differential and transmission speed and won't let the CC work. Maybe its to prevent gear slippage (just in case tranny is X% faster than tires)??.
#56
03-11-2010, 10:57 AM
#57
03-19-2010, 03:16 PM
#58
03-19-2010, 05:48 PM
)...
#59
03-20-2010, 01:24 AM