anyone with 3:55 gears please help......

5.0dan · 08-15-2001, 06:53 PM

hey....
ok, I just bought my first 5.0 like 2 months ago. The guy I bought it off of said it was all stock and i think it is accept for maybe gears. The car pulls way more than my brothers mustang which has 2:73's in it and revs way higher.

so my question is what rpm are you at going like 100km/hr with 3:55's or 3:08's

thanx alot

jimberg · 08-15-2001, 07:06 PM

It depends on the size of the tire. Go to the analyzer section on this web site and there is a calculator to figure this out for you.

I can tell you this. If you hit the rev limiter in 4th gear you are going about 128mph.

------------------
351W 89 Mustang GT Convertible

BowTie Eater 5 Liter · 08-16-2001, 02:30 AM

you could well have 3.08s in it stock (mine did) when im goin 80km/h in 5th with my 26.1"tire (235/60/15), i am at like 1400rpms or close to that.

------------------
1988 Mustang GT, T-5
3.08's, No Smog Pump (Shorty Belt), Dumps At The End Of Stock H-Pipe, K&N Air Filter (Stock Air Box), Removed Air SilencerMy Stang
My Site (Not Done Yet)

84LX89GT · 08-16-2001, 03:50 AM

my '89 GT has 3.55 gears and with i believe 24" tires (225/50ZR15 tires) and at 60mph it's at 2000rpm. Here's a test, go 60mph in 5th gear and if it accelerates the same as if it were going 30mph in 4th then you have gears. There's a HUGE difference in how the car responds with those gears than my '84 with 3.08 gears (there's also a large horsepower difference, but i can feel where each engine starts to pull and the '84 starts pulling like about 75 or 80).

------------------
previous name: 84stangLX
'84 Mustang 5.0 LX
my LX
'89 Mustang GT
my GT

Mr 5 0 · 08-16-2001, 03:14 PM

For what it's worth:

I have 3.55 rear gears with 26.5" tires (225/ 60/15) on the stock 15" wheels.

In fifth gear, I run about 1900 RPM @ 65 mph.

5.0dan · 08-16-2001, 05:36 PM

thanx alot guys i'll check it out

undrdog · 08-20-2001, 04:02 PM

Another way to tell for sure is to jack the rear of the car up and put a mark on the drive shaft and one on the tire, and count how many times the drive shaft turns for 1 turn (360*) of the tire. If the D/S turns approx. 3 1/2 times with one turn of the wheel you have 3.55s. 3 3/4 = 3.73 etc.

08-15-2001, 06:53 PM	#1
5.0dan Registered Member Join Date: Aug 2001 Location: canada Posts: 2	anyone with 3:55 gears please help...... hey.... ok, I just bought my first 5.0 like 2 months ago. The guy I bought it off of said it was all stock and i think it is accept for maybe gears. The car pulls way more than my brothers mustang which has 2:73's in it and revs way higher. so my question is what rpm are you at going like 100km/hr with 3:55's or 3:08's thanx alot

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08-15-2001, 07:06 PM	#2
jimberg Registered Member Join Date: Oct 1998 Location: Rogers, MN Posts: 2,089	It depends on the size of the tire. Go to the analyzer section on this web site and there is a calculator to figure this out for you. I can tell you this. If you hit the rev limiter in 4th gear you are going about 128mph. ------------------ 351W 89 Mustang GT Convertible

08-16-2001, 02:30 AM	#3
BowTie Eater 5 Liter Registered Member Join Date: Nov 2000 Location: Maple Ridge B.C. Canada, The Best Place In The World Posts: 871	you could well have 3.08s in it stock (mine did) when im goin 80km/h in 5th with my 26.1"tire (235/60/15), i am at like 1400rpms or close to that. ------------------ 1988 Mustang GT, T-5 3.08's, No Smog Pump (Shorty Belt), Dumps At The End Of Stock H-Pipe, K&N Air Filter (Stock Air Box), Removed Air SilencerMy Stang My Site (Not Done Yet)

08-16-2001, 03:50 AM	#4
84LX89GT Mustangs Join Date: Jul 2000 Posts: 1,938	my '89 GT has 3.55 gears and with i believe 24" tires (225/50ZR15 tires) and at 60mph it's at 2000rpm. Here's a test, go 60mph in 5th gear and if it accelerates the same as if it were going 30mph in 4th then you have gears. There's a HUGE difference in how the car responds with those gears than my '84 with 3.08 gears (there's also a large horsepower difference, but i can feel where each engine starts to pull and the '84 starts pulling like about 75 or 80). ------------------ previous name: 84stangLX '84 Mustang 5.0 LX my LX '89 Mustang GT my GT

08-16-2001, 03:14 PM	#5
Mr 5 0 Conservative Individualist Join Date: May 1997 Location: Wherever I need to be Posts: 7,487	For what it's worth: I have 3.55 rear gears with 26.5" tires (225/ 60/15) on the stock 15" wheels. In fifth gear, I run about 1900 RPM @ 65 mph.

08-16-2001, 05:36 PM	#6
5.0dan Registered Member Join Date: Aug 2001 Location: canada Posts: 2	thanx alot guys i'll check it out

08-20-2001, 04:02 PM	#7
undrdog Registered Member Join Date: Apr 1999 Location: Pittsburgh, Pennsylvania Posts: 73	Another way to tell for sure is to jack the rear of the car up and put a mark on the drive shaft and one on the tire, and count how many times the drive shaft turns for 1 turn (360*) of the tire. If the D/S turns approx. 3 1/2 times with one turn of the wheel you have 3.55s. 3 3/4 = 3.73 etc.