Tranny Info - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Low Truck FNG · 05-27-2003, 02:23 PM

Since I'm new to the Chevy Truck scene, I thought I'd pose a question to all you experienced gear heads out there. What's the best transmission between the 350, 400 and 700? What's the advantages / disadvantages of each and why the hell don't they have drain plugs and exterior / changeable filters?

BigRed · 05-27-2003, 02:41 PM

They're all good trannies. The main advantage is the overdrive in the 700. It improves gas mileage!

The 400 is a stronger tranny and is usually matched up with a high-horsie small block or a big block.

Quote:

why the hell don't they have drain plugs and exterior / changeable filters?

That's definitely a good question. However, you can buy a drain plug and put it in there. I got one and will install when I change my fluid next.

Low Truck FNG · 05-27-2003, 04:32 PM

I've seen pans with drain plugs offered for the 350. Does anyone know if and who offers one for the 700?

SS79chevy · 05-27-2003, 05:27 PM

Th350 is a good trany for mild hp motors but can be made for high hp motors and is lower geared than the TH400 making you faster in the 1/8 mile but slower in the 1/4 mile

TH400 is the strongest of the tranys good for high hp motors this trany is good for racing stock but it can be made better it is higher geared than the TH350 making you slower in the 1/8 mile but faster in the 1/4 mile.

700R4 is good for low hp daily drivers DO NOT try to race it because it will break very fast but you can have this one built up and it makes a good race trany because it is geared very well for both the 1/8 and the 1/4 mile but you will spend up to $2,500

as for the drain plugs B&M makes a drain plug you can put in your self it fits all tranys you can get a exterior filter kit for summit just go to WWW.summitracing.com and you can find both of these.

apstguy · 05-27-2003, 07:28 PM

Drain plug were not installed because GM wanted the filter changed everytime the fluid is changed. It's GM logic I tell ya ...

navybear70 · 05-28-2003, 02:26 AM

My buddy is racing his 82 swb with a tired 350 and a rebuilt 700R4 w/ shift kit. He wants my TH350 for racing and I want his 700 for gas mileage, but he has raced the 700 a few times. (ran a 15.07 fairly stock too.) Do you think he's damaged it any? The rebuild is new as is the shift kit.

gchemist · 05-28-2003, 03:55 AM

If it's still running and shifting fine it's okay. My 700R4 behaved better after I took it out once for 1/8 mile racing. I say take the deal!! The 700R4 is worth more.

Low Truck FNG · 05-28-2003, 11:41 AM

I checked the Summit website and there is one TH700 pan with a drain plug offered, but it's a deep pan. Has anyone installed one of these and does it fit ok with the cross member/tranny mount?

79BIG10 · 05-28-2003, 03:43 PM

You shouldn't have any trouble with the crossmember/ tranny mount. The pan's outer area dimension stays the same only the depth changes. The crossmember won't hit the new pan.

SS79chevy · 05-28-2003, 05:38 PM

I'v got a deep pan on my TH400 there sould not be eny clearens problems and it makes the trany run cooler and last longer

05-27-2003, 02:23 PM	#1
Low Truck FNG Registered User Join Date: May 2003 Location: Chandler, AZ Posts: 51	Tranny Info Since I'm new to the Chevy Truck scene, I thought I'd pose a question to all you experienced gear heads out there. What's the best transmission between the 350, 400 and 700? What's the advantages / disadvantages of each and why the hell don't they have drain plugs and exterior / changeable filters? __________________ Brian '86 C10 Silverado, 350/700

05-27-2003, 04:32 PM	#3
Low Truck FNG Registered User Join Date: May 2003 Location: Chandler, AZ Posts: 51	I've seen pans with drain plugs offered for the 350. Does anyone know if and who offers one for the 700? __________________ Brian '86 C10 Silverado, 350/700

05-27-2003, 05:27 PM	#4
SS79chevy Registered User Join Date: May 2003 Location: hurst,TX Posts: 73	Th350 is a good trany for mild hp motors but can be made for high hp motors and is lower geared than the TH400 making you faster in the 1/8 mile but slower in the 1/4 mile TH400 is the strongest of the tranys good for high hp motors this trany is good for racing stock but it can be made better it is higher geared than the TH350 making you slower in the 1/8 mile but faster in the 1/4 mile. 700R4 is good for low hp daily drivers DO NOT try to race it because it will break very fast but you can have this one built up and it makes a good race trany because it is geared very well for both the 1/8 and the 1/4 mile but you will spend up to $2,500 as for the drain plugs B&M makes a drain plug you can put in your self it fits all tranys you can get a exterior filter kit for summit just go to WWW.summitracing.com and you can find both of these. __________________ 1979 chevy c10 short bed step side BBC in the works Last edited by SS79chevy; 05-27-2003 at 05:37 PM.

05-27-2003, 07:28 PM	#5
apstguy LED King Join Date: Jan 2003 Location: Sacramento, CA Posts: 2,087	Drain plug were not installed because GM wanted the filter changed everytime the fluid is changed. It's GM logic I tell ya ... __________________ Tyler 1985 C10 305 w/ Bowtie OD TH700R4 3.42 LSD 202,000 miles 2006 Ford Focus ZX3 5-speed Stick 2016 Chevy Spark EV Gone: 2002.5 VW GTI 24v VR6 Gone: 2008 VW R32

05-28-2003, 02:26 AM	#6
navybear70 hometown heroes! Join Date: Jan 2003 Location: Ewa Beach, HI Posts: 487	My buddy is racing his 82 swb with a tired 350 and a rebuilt 700R4 w/ shift kit. He wants my TH350 for racing and I want his 700 for gas mileage, but he has raced the 700 a few times. (ran a 15.07 fairly stock too.) Do you think he's damaged it any? The rebuild is new as is the shift kit. __________________ 2009 Silverado 2wd, 121k as of 04APR13. I love my truck 29 days out of the month. The payment is due on the 30th... Do your duty in all things. You cannot do more, you should never wish to do less. -Robert E. Lee "Never give up ground you've already taken." -Unknown

05-28-2003, 03:55 AM	#7
gchemist BAD BOW-Silverado XST Join Date: May 2000 Location: Senior Member from Austin, TX Posts: 6,431	If it's still running and shifting fine it's okay. My 700R4 behaved better after I took it out once for 1/8 mile racing. I say take the deal!! The 700R4 is worth more. __________________ Gerardo a.k.a. Mad Chemist Silverado XST videos

05-28-2003, 11:41 AM	#8
Low Truck FNG Registered User Join Date: May 2003 Location: Chandler, AZ Posts: 51	I checked the Summit website and there is one TH700 pan with a drain plug offered, but it's a deep pan. Has anyone installed one of these and does it fit ok with the cross member/tranny mount? __________________ Brian '86 C10 Silverado, 350/700

05-28-2003, 03:43 PM	#9
79BIG10 I'm back with 2nd truck! Join Date: Feb 2002 Location: Texas Posts: 3,774	You shouldn't have any trouble with the crossmember/ tranny mount. The pan's outer area dimension stays the same only the depth changes. The crossmember won't hit the new pan. __________________ 1979 Chevrolet Bonanza Big10 "Tootsie Roll" 1985 Chevrolet Silverado (wife's) Member of the Southern Bowties Club "Don't underestimate how sexy a fat man who drinks to excess can be." Homer Simpson

05-28-2003, 05:38 PM	#10
SS79chevy Registered User Join Date: May 2003 Location: hurst,TX Posts: 73	I'v got a deep pan on my TH400 there sould not be eny clearens problems and it makes the trany run cooler and last longer __________________ 1979 chevy c10 short bed step side BBC in the works Last edited by SS79chevy; 05-28-2003 at 05:40 PM.

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