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#1
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70 Black Large Diameter shift knob
Trying to get a definitive measurement on the 70 only black four speed shift knob for my 70 Formula.
I contacted Ames, and they indicated the large diameter (which they list as larger than original) as 2 inch, and the standard non 70 as 1.5 inch. An old post here shows a caliper reading of over 2 inch, but I can't quite make out the measurement.. Thanks in advance.. |
#2
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the one I've got is about 2.125" (2-1/8"). Pretty sure it's an Ames repro.
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#3
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The old 1960s Pontiac, 1st Gen Firebird & OHC Sprint6 Lemans+GTO (Hurst shifter cars) both 3 and 4 speed floor shift manual transmission knobs were all a standard size: 1 & 7/8" in diameter.
Depending on what year print; parts book you are looking at either late in 1969 or right at the start of the 1970 model year Pontiac decided to be different & they increased their shift knobs to 2.10" in diameter. I've often heard these early 1970s knobs referred to as the tennis ball knob.
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Peter Serio Owner, Precision Pontiac |
#4
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FWIW, the Hurst Dual Gate used the little one, an inch and five eighths.
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#5
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The black shift ball in my 1970 Formula is 2.250 diameter.
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#6
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When did the 70's switch knobs? Mine was built 3rd week of March, and its missing its original knob.
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"Those poor souls have made the fatal mistake of surrounding us. Now we can fire in any direction" 1970 Trans Am RAIII 4 speed 1971 Trans Am 5.3 LM7 1977 Trans Am W72 Y82 1987 Grand National |
#7
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Mine measures 2.080 so very close to the 2.1 stated above.
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#8
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Hard to tell from that picture, but it looks like 2.180, not 2.080
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#9
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2.080 I might know how to read my own caliper.
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#10
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Lol. I’m very proud of ya
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#11
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Quote:
the exception are the few cars which recieved a simulated leather wrapped knob with a red insert. I am NOT sharing this to too my own horn, there are several other threads here about it should you care to dig deeper - look for item "E3": https://forums.maxperformanceinc.com...&postcount=349
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1970 Formula 400 Carousel Red paint on Black standard interior A no-engine, no-transmission, no-wheel option car. Quite likely one of few '70 Muncie three speed Formula 400's left. 1991 Grand Am: 14.4 @ 93.7mph (DA corrected) (retired DD, stock appearing) 2009 Cobalt SS: 13.9 @ 103mph (current DD; makes something north of 300hp & 350ft/lbs) Last edited by unruhjonny; 07-01-2019 at 07:49 PM. |
#12
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Just trying to help. Didn't need a wise ass remark.
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#13
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Right, but was there any other way to respond to your “help”? How’s this thanks for your help, but I’m pretty well versed in the reading of precision measuring instruments. I hope that is less offensive to you. By the way your ball seems to be atleast 1/8 of an inch larger than all the others posted. Is there a chance yours is incorrect?
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