DAMN! I got 4.10 gears!! - The 1947 - Present Chevrolet & GMC Truck Message Board Network

TIMSPEED · 04-16-2003, 01:59 AM

Shyeah. After weeks of waiting, I finally drove it today, and I got it up to 50mph, and at 50mph it was at right about 2500... Damn man, looks like I'll have to go down to 3.42's ASAP!

Prerunner1982 · 04-16-2003, 02:13 AM

damn i cruize the highway about 65-70 at 2400.

TIMSPEED · 04-16-2003, 02:29 AM

Quote:

Originally posted by Prerunner1982
damn i cruize the highway about 65-70 at 2400.

I cruise at 70@2000rpm...in my vette

(3.07 gears with a 700R)
But seriously dude, at 65, try around 3500rpm

Now I remember why this thing can pass anything but a gas station...

Prerunner1982 · 04-16-2003, 02:32 AM

3.07s....th350....and 31x11.50s..

bigblock73 · 04-16-2003, 07:41 AM

I don't think they are 4.10's...I have 4.10's and at 60 I am just above 3000 RPM's...I bet you have 3.73 gears.

-Jeff

jon_volk · 04-16-2003, 08:30 AM

Quote:

Originally posted by bigblock73
I don't think they are 4.10's...I have 4.10's and at 60 I am just above 3000 RPM's...I bet you have 3.73 gears.

-Jeff

tire height is probably different...put taller tires on and itll drop your revs a bit.

bigblock73 · 04-16-2003, 09:22 AM

that is with 29.1" tires out back!

doh

I now have a 700r4...can't wait...lower first gear too!

Tom · 04-16-2003, 11:52 AM

If you really have 4.10's, and want 3.42's, then we should trade. I have 3.42's in my 78 and I want/need 4.10's. More speed!!!!!!!!!!!!!!!

*Zilverado* · 04-16-2003, 01:43 PM

Since we're on the topic of rearends and rpm, just thought I'd ask. Does this sound right?

At approximately 60mph, my new tach is showing around 1500 rpm. This is with a:
305
700R4 tranny (in OD)
3.07 rearend
LT235/75 R15 rubber

BTW - I love the gas mileage

78' Silverado · 04-16-2003, 01:56 PM

Sweet man, It took them that log to install them!! Anyways i am looking for some new gears as well

If u don't mind me asking how much did the setup cost you?

TIMSPEED · 04-16-2003, 01:56 PM

Quote:

Originally posted by Zilverado
Since we're on the topic of rearends and rpm, just thought I'd ask. Does this sound right?

At approximately 60mph, my new tach is showing around 1500 rpm. This is with a:
305
700R4 tranny (in OD)
3.07 rearend
LT235/75 R15 rubber

BTW - I love the gas mileage

Yup, that sounds about right! Gotta remember that's a 29" Tall tire.
For more help on that subject go to www.smokemup.com then click on Auto Math.

78' Silverado · 04-16-2003, 02:04 PM

Link won't work for me

*Zilverado* · 04-16-2003, 02:11 PM

Great, thanks Tim.

Now if only someone could tell me why my tach jumps around (between 1000 and 2000) when the engine is not under load (i.e. idling or coasting w/ foot off the gas).

I posted this in another thread, but just thought I would double the question, double the fun

.

Thanks again.

04-16-2003, 01:59 AM	#1
TIMSPEED Join Date: Jan 2003 Location: Modesto, CA Posts: 1,321	DAMN! I got 4.10 gears!! Shyeah. After weeks of waiting, I finally drove it today, and I got it up to 50mph, and at 50mph it was at right about 2500... Damn man, looks like I'll have to go down to 3.42's ASAP! __________________ I have a few cars... See Them Here

04-16-2003, 02:13 AM	#2
Prerunner1982 Registered User Join Date: Oct 2002 Location: Edmond, OK Posts: 5,904	damn i cruize the highway about 65-70 at 2400. __________________ Jon 1982 Chevy Silverado 350/th350.... RETIRED 1993 Jeep XJ 2 door(Cherokee) 4wd 4.0ltr/AX-15 (5spd)/NP231 .... Oklahoma Roll Call

04-16-2003, 02:32 AM	#4
Prerunner1982 Registered User Join Date: Oct 2002 Location: Edmond, OK Posts: 5,904	3.07s....th350....and 31x11.50s.. __________________ Jon 1982 Chevy Silverado 350/th350.... RETIRED 1993 Jeep XJ 2 door(Cherokee) 4wd 4.0ltr/AX-15 (5spd)/NP231 .... Oklahoma Roll Call

04-16-2003, 11:52 AM	#8
Tom driving is in my blood Join Date: Dec 1999 Location: Mesa AZ Posts: 5,748	If you really have 4.10's, and want 3.42's, then we should trade. I have 3.42's in my 78 and I want/need 4.10's. More speed!!!!!!!!!!!!!!! __________________ -78 c10 short/step: 388cid, M20, 5/5 drop, lots more. Playtoy and first vehicle. -98 c1500 x-cab: 5.7L, 17" rims, 5/6 drop, flowmaster, helper bags,NBS rear disk brakes. -02 Suburban 4x4: leveled front -CBR600F4i, CBR600RR, CBR1000RR, and standup skis DISCLAIMER: I cant spell for the life of me.

04-16-2003, 01:56 PM	#10
78' Silverado \/ My Loves \/ Join Date: Mar 2003 Location: Midland,Texas Posts: 462	Sweet man, It took them that log to install them!! Anyways i am looking for some new gears as well If u don't mind me asking how much did the setup cost you? __________________ 78' Silverado - Blue - (In a Coma) 04' Silverado -Red- 383 Stroker in progress for the 78'!!!

04-16-2003, 07:41 AM	#5
bigblock73 yeller Join Date: Oct 2001 Location: Twin Cities Posts: 13,824	I don't think they are 4.10's...I have 4.10's and at 60 I am just above 3000 RPM's...I bet you have 3.73 gears. -Jeff

04-16-2003, 09:22 AM	#7
bigblock73 yeller Join Date: Oct 2001 Location: Twin Cities Posts: 13,824	that is with 29.1" tires out back! doh I now have a 700r4...can't wait...lower first gear too!

04-16-2003, 01:43 PM	#9
Zilverado Account Suspended Join Date: Nov 2002 Location: Winnipeg, Manitoba, Canada Posts: 798	Since we're on the topic of rearends and rpm, just thought I'd ask. Does this sound right? At approximately 60mph, my new tach is showing around 1500 rpm. This is with a: 305 700R4 tranny (in OD) 3.07 rearend LT235/75 R15 rubber BTW - I love the gas mileage

04-16-2003, 02:04 PM	#12
78' Silverado \/ My Loves \/ Join Date: Mar 2003 Location: Midland,Texas Posts: 462	Link won't work for me __________________ 78' Silverado - Blue - (In a Coma) 04' Silverado -Red- 383 Stroker in progress for the 78'!!!

04-16-2003, 02:11 PM	#13
Zilverado Account Suspended Join Date: Nov 2002 Location: Winnipeg, Manitoba, Canada Posts: 798	Great, thanks Tim. Now if only someone could tell me why my tach jumps around (between 1000 and 2000) when the engine is not under load (i.e. idling or coasting w/ foot off the gas). I posted this in another thread, but just thought I would double the question, double the fun . Thanks again.

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